Caulking tape system and method for controlled joint formation

Abstract

A caulking tape system includes a cylindrical roll carrying an elongate tape formed by a pair of masking tape strips spaced apart by a transparent cover strip. The masking tape strips adhere to adjacent substrate edges, defining a gap corresponding to a joint width. The transparent cover strip spans the gap during alignment and is peelable to expose a channel for filler material such as sealant or grout. After application, the masking tape strips are removed, leaving a uniform, residue-free joint suitable for a range of internal and external surfaces.

Description

Caulking Tape System and Method for Controlled Joint Formation Field of the Invention

[0001] The disclosure relates to masking and sealing systems for applying filler materials between adjacent substrates. It is particularly directed to a caulking tape system configured to define a clean, uniform channel for the application of sealants, grouts, or other joint-filling materials in construction, tiling, glazing, and cladding applications.Background of the Invention

[0002] In construction, glazing, and surface-finishing work, it is frequently necessary to apply a sealant, grout, or similar filler material between adjacent substrates to provide a clean and sealed junction. Achieving a uniform joint line while avoiding overflow of filler material onto visible surfaces can be difficult, particularly along long seams or in corner regions. Traditional approaches often rely on the manual placement of two separate masking tape strips along the sides of a joint, leaving a channel between them for the filler. This process can be time-consuming and prone to inconsistency, as even slight misalignment of the tape strips may result in uneven joint widths or contamination of the substrate surfaces with excess material.

[0003] Various tape-based systems have been proposed to assist in defining the filler application region. For example, GB 2 588 380 A (William, published 28 April 2021) discloses a seam-sealing tape comprising strips with slots and alignment marks visible through removable films. In use, the films are peeled away to expose the slots through which sealant can be applied. Although such systems allow visual alignment, they typically involve discontinuous strips that must be cut or torn to length and include bridging portions or removable films that complicate application and removal.

[0004] Similarly, US 2008 / 0085366 A1 (Liam et al., published 10 April 2008) describes a tape for caulking or grouting corners, having two double-sided adhesive strips attached to a backing strip and folded in half along its length. The folded configuration is pressed into a corner joint and unfolded to adhere to the adjoining surfaces. While useful for corner sealing, this arrangement requires a divider strip to prevent adhesionwithin the roll and is limited to folded configurations rather than flat application on planar joints.

[0005] A further approach is shown in US 2022 / 0048067 A1 (Wold, published 17 February 2022), which discloses a rapid caulk tape system comprising a single strip with two longitudinal perforations defining a non-adhesive region. After the tape is applied, the central section is torn away to form a channel for sealant. This design relies on tearing along perforations, which can lead to irregular edges and incomplete separation, particularly in longer runs, and can also be difficult to manufacture consistently.

[0006] Each of these known systems provides partial solutions to the problem of masking and joint definition but tends to involve multiple removable layers, folding operations, or mechanical tearing, which introduce complexity and risk of misalignment. There remains a need for a simpler and more reliable arrangement that enables rapid, accurate placement of masking strips with a fixed, predetermined spacing, that can be dispensed directly from a roll in flat form, and that allows clear visual alignment prior to application of the filler material.

[0007] It is to be understood that, if any prior art information is referred to herein, such reference does not constitute an admission that the information forms part of the common general knowledge in the art, in Australia or any other country.Summary of the Disclosure

[0008] The disclosure relates to a caulking tape system designed to enable precise and clean formation of joints between adjacent substrates. The system includes a cylindrical roll carrying an elongate length of caulking tape formed by a pair of masking tape strips maintained in a spaced-apart arrangement by a wider transparent cover strip. The masking tape strips have adhesive undersides configured to adhere to the respective edge surfaces of two substrates, while the cover strip has an adhesive underside portion that attaches to the upper surfaces of the masking tape strips. The cover strip spans a central region defining a nominal gap corresponding to the desired joint width.

[0009] In use, the caulking tape is dispensed flat from the roll and positioned across the gap between the substrates so that the masking tape strips adhere to the adjoining edge surfaces while the transparent cover strip bridges the space between them. The transparency of the cover strip enables visual alignment of the tape with the underlying joint, ensuring that the nominal gap lies centrally over the seam. Once applied, the cover strip is peeled away to expose a clean, uniform channel defined between the inner edges of the masking tape strips. Filler material such as silicone, grout, or epoxy may then be applied into the exposed channel, after which the masking tape strips are removed to leave a sharply defined joint.

[0010] The system provides a continuous, planar tape assembly that can be applied directly from the roll without folding or manual adjustment of the masking elements. The spaced relationship between the masking tape strips is maintained inherently by the cover strip, ensuring consistent joint width and alignment over long distances. The arrangement eliminates the need for separate divider or bridging components and allows the tape to be applied in a single smooth operation. By combining a flexible transparent cover strip with precisely spaced masking tape strips, the system enables efficient preparation and finishing of joints across a variety of substrates while substantially reducing surface contamination and the need for post-application cleanup.

[0011] The system may be produced in a variety of configurations to suit different joint widths and filler materials. In one preferred form, the spacing between the masking tape strips corresponds to a nominal gap of approximately 3 mm, which may be suitable for fine joints such as grout or epoxy seams between tiles. Larger configurations may include gaps of about 6 mm for right-angled corner joints or 11 mm for broader expansion joints found in cladding or masonry structures. By providing a controlled set of gap dimensions, the installer may select the appropriate tape variant for the intended joint, ensuring consistent sealant depth and visual uniformity across the installation.

[0012] In certain embodiments, the transparent cover strip may extend laterally beyond the outer edges of the masking tape strips. The extended edge portions maybe non-adhesive and allow the user to lift and remove the cover strip cleanly after placement of the tape, reducing the likelihood of disturbing the masking strips once adhered to the substrates. The extension also provides a convenient handling surface that simplifies application, particularly when wearing gloves or working in confined spaces.

[0013] In some versions, the width of each extended edge of the cover strip may be approximately half the width of the central non-adhesive region separating the masking tape strips. For instance, a cover strip having a 24 mm central gap may extend by 12 mm on either side. Such proportionality may permit adjacent lengths of caulking tape to be aligned precisely edge-to-edge, so that when multiple runs are applied side by side, each resulting joint is equally spaced. This characteristic may be advantageous for creating decorative or evenly distributed filler lines without the use of external spacers.

[0014] The transparent cover strip may be made from a flexible plastic film which allows it to bend smoothly over contoured or angled surfaces while maintaining dimensional stability. The use of plastic film can also provide clarity, moisture resistance, and mechanical strength under tension during unrolling. A particularly suitable material may be polyethylene terephthalate, which offers transparency, flexibility, and durability under repeated handling.

[0015] The masking tape strips may, in preferred forms, be manufactured from paperbased material conformable to textured or uneven surfaces and can be easily torn by hand without the need for cutting tools. Their surface texture can also help prevent slippage during application and assist in achieving a crisp joint edge when removed after curing.

[0016] The adhesion characteristics of the components may be configured so that the cover strip adheres less strongly than the masking tape strips. This relationship allows the cover strip to be peeled away without dislodging the masking strips once they have been pressed onto the substrate surfaces. The weaker bond between the cover strip and masking strips may also assist in maintaining smooth, continuous removal over long joint runs.

[0017] In some forms, the cover strip may include a longitudinal line of weakness, such as a crease or series of fine perforations. This feature allows the tape assembly to be folded precisely along its centreline, enabling accurate placement around both internal and external corners. The line of weakness ensures that when the tape is bent, the nominal gap remains centred, allowing an even filler bead to be formed along the junction of two perpendicular surfaces.

[0018] The caulking tape may be wound on the cylindrical roll so that the transparent cover strip forms the outermost layer. This orientation may prevent the adhesive undersides of the masking tape strips from sticking to other layers, eliminating the need for a separate release liner. When the tape is unwound, it may emerge flat and ready for direct placement on the substrates.

[0019] The underside of the transparent cover strip may include narrow adhesive regions along its lateral edges. These regions may secure the masking tape strips during storage and dispensing, ensuring that the spacing between the strips remains constant. When the tape is pulled from the roll, the masking strips may move together as a single unit with the cover strip, maintaining accurate alignment until the cover strip is peeled away.

[0020] The cover strip may exhibit a level of tear resistance sufficient to withstand continuous peeling without rupture. This ensures that even during extended applications, such as sealing the joints of large fagade panels, the cover strip maintains structural integrity, allowing clean removal in one motion.

[0021] Visual alignment of the tape may be enhanced by printed or embossed guide markings along the length of the transparent cover strip. These markings may appear as fine longitudinal lines or patterns parallel to the masking tape strips and serve as visual references for straight application over long runs.

[0022] The cover strip may be configured so that it can be removed in a single, continuous peeling action. This arrangement allows an installer to expose the filler channel progressively while applying the joint material, maintaining workflow efficiency and reducing handling interruptions.

[0023] In some production methods, the masking tape strips and cover strip may be co-extruded or laminated together to maintain a consistent spacing across the width of the tape. This manufacturing process may reduce variation between batches and ensures uniform joint dimensions, which is beneficial where aesthetic consistency is required across extensive surfaces.

[0024] A further aspect provides a method for forming a joint between adjacent substrates using the caulking tape system as described. The method may involve applying the caulking tape across a gap defined between the substrates so that the masking tape strips adhere respectively to the opposing edge surfaces and the transparent cover strip bridges the gap therebetween. The cover strip may then be removed to expose a defined channel suitable for receiving a filler material. The filler material may be dispensed into the channel by a nozzle, caulking gun, or other applicator, and subsequently levelled or smoothed as required. Once the filler has partially set, the masking tape strips may be peeled away, removing with them any surplus material adhering to their edges and leaving a clean, uniform joint.

[0025] This approach may allow accurate, rapid formation of joints across a range of materials without the need for manual alignment of separate tape pieces. The transparency of the cover strip may facilitate central alignment of the tape with the underlying joint, while the predetermined spacing of the masking tape strips ensures that the filler material occupies the joint evenly. The peeling removal sequence may result in sharply defined joint margins, reducing the need for post-finishing or cleanup.

[0026] Other aspects of the invention are also disclosed.Brief Description of the Drawings

[0027] Notwithstanding any other forms which may fall within the scope of the present invention, preferred embodiments of the disclosure will now be described, by way of example only, with reference to the accompanying drawings in which:

[0028] Figure 1 shows a perspective view of a cylindrical roll of caulking tape having a pair of masking tape strips and a removable transparent cover strip.

[0029] Figure 2 shows a plan view of the caulking tape before the cover strip is removed, illustrating the nominal gap, overlapping edges, and optional line of weakness.

[0030] Figures 3a-3d illustrate sequential stages of the application process, including placement of the caulking tape, removal of the cover strip, application of filler material, and removal of the masking tape strips to form a finished joint.Description of Embodiments

[0031] Referring to Figures 1 to 3, the caulking tape system 100 comprises a cylindrical roll 101 carrying an elongate length of caulking tape 102 wound flat thereon. The tape 102 includes a pair of masking tape strips 103 arranged in a spaced-apart parallel configuration and a transparent cover strip 104 extending across and connecting the masking tape strips 103. The masking tape strips 103 are positioned on either side of a nominal central gap 106 which is defined by the spacing between the inner edges of the masking tape strips 103 and corresponds approximately to the joint width between a pair of adjacent substrates 112. Each masking tape strip 103 has an adhesive underside configured to adhere to the upper edge surfaces 114 of the respective substrates during use, while the underside of the cover strip 104 includes adhesive only at its lateral edge portions to adhere to the upper surfaces of the masking tape strips 103.

[0032] The caulking tape 102 is wound onto the roll 101 such that the cover strip 104 forms the outermost surface layer. In this arrangement, the adhesive undersides of the masking tape strips 103 are enclosed and protected by the cover strip 104, thereby preventing unwanted adhesion between adjacent layers of tape on the roll. The roll 101 may be formed with a cylindrical cardboard core 105 or equivalent spool, allowing convenient storage, handling, and dispensing of the tape in continuous lengths.

[0033] In use, the caulking tape 102 is dispensed flat from the roll 101 and positioned across the joint region defined between two adjacent substrates 112, such as wall tiles, paving blocks, or cladding panels. The masking tape strips 103 are pressed firmly against and adhered to the opposing edge surfaces 114 of the substrates 112while the transparent cover strip 104 spans the intervening gap 113. The transparency of the cover strip 104 allows the user to visually align the tape so that the central gap 106 is positioned exactly over the joint between the substrates.

[0034] Once applied, the cover strip 104 is peeled away from the masking tape strips 103 to expose the gap 106 between them. This peeling step may be performed by prising up an outer edge 109 of the cover strip using a fingernail or similar tool, aided by the fact that, in certain embodiments, the cover strip 104 may extend laterally beyond the outer edges 108 of the masking tape strips, ensuring that its removal does not disturb the adhesion of the masking tape strips, which remain securely affixed to the edge surfaces 114.

[0035] With the cover strip 104 removed, the masking tape strips 103 define a clean and uniform channel bounded by their inner edges. A filler material 115, such as silicone sealant, grout, or epoxy, may be applied through a nozzle or caulking gun directly into the exposed gap 113. The masking tape strips 103 prevent excess filler material from spreading onto the visible surfaces of the substrates 112. The applied filler material may be smoothed with a blade or tool while the masking tape strips remain in place to ensure a uniform surface finish. After the filler material has partially set, the masking tape strips 103 are peeled away, taking with them any excess material deposited at the margins of the joint and leaving a neat, sharply defined line of filler material 115 between the substrates 112.

[0036] The described arrangement provides accurate control over the spacing of the masking tape strips, ensuring a uniform joint width consistent with the selected nominal gap 106 on the roll. Because the caulking tape 102 is dispensed flat from the cylindrical roll 101, there is no need for folding or manual separation of layers, enabling continuous and efficient application along extended joints such as tiled walls or brick cladding surfaces.

[0037] Referring again to Figures 1 to 3, the spacing between the masking tape strips 103 defines a nominal gap 106 which may be selected to correspond to the width of the gap 113 between adjacent substrates 112. The nominal gap 106 may be manufactured to precise dimensional tolerances to ensure consistent filler applicationand uniform joint appearance. In one embodiment, the nominal gap 106 is approximately 3 mm, a configuration particularly suited to the application of grout or epoxy filler materials between tiles or similar substrates having narrow separation. The relatively small spacing allows accurate placement of grout material without overflow onto the visible faces of the substrates while maintaining the clean edge definition afforded by the masking tape strips 103.

[0038] In an alternative embodiment, the nominal gap 106 is approximately 6 mm, making it suitable for use in caulking applications at 90-degree junctions, such as the intersection of wall and floor panels, or between a benchtop and an upstand. The increased width accommodates a greater bead of flexible sealant, allowing for sufficient depth of filler material to absorb differential movement between the adjoining surfaces while maintaining the integrity of the seal.

[0039] For larger structural applications, such as external cladding panels or brickwork expansion joints, the nominal gap 106 may be approximately 11 mm. This configuration enables the application of higher volumes of elastomeric or polyurethane sealant necessary to accommodate expansion and contraction of building materials exposed to temperature variations and environmental loading. The larger spacing also assists in achieving the correct aspect ratio of sealant depth to width, which is typically required for durability in such joints.

[0040] The spacing between the masking tape strips 103 may be established during manufacture of the caulking tape 102 by accurately controlling the width of the nonadhesive central portion of the transparent cover strip 104. The cover strip thus acts as both an alignment carrier and a dimensional spacer, ensuring that the masking tape strips 103 are presented in their predetermined separation when unrolled. By selecting the nominal gap according to the intended joint width and filler type, a single product family can serve multiple construction and finishing applications without requiring separate alignment tools or guides.

[0041] As shown in Figures 1 and 2, the transparent cover strip 104 may extend laterally beyond the respective outer edges 108 of the masking tape strips 103 to define overlapping edges 109. These overlapping edges are preferably non-adhesiveand serve as handling margins for lifting and removing the cover strip once the masking tape strips 103 have been adhered to the substrates 112. The provision of these extended edges 109 allows a user to easily prise up an end of the cover strip 104 using a fingernail or small tool, enabling it to be peeled away cleanly without dislodging the underlying masking tape strips 103. This configuration simplifies the removal process, particularly when the tape is applied along long linear joints where precise control of peel initiation prevents disturbance to the aligned masking surfaces.

[0042] The lateral extension of the cover strip 104 beyond the masking tape strips also prevents the cover strip from adhering directly to the substrates 112, reducing the risk of accidental lifting or tearing of the masking tape strips during handling. In one example, the width of each overlapping edge 109 may be approximately half the distance defined between the inner edges of the masking tape strips 103. For instance, where the nominal gap 106 between the masking tape strips is 24 mm, each outer extension 109 may be 12 mm wide. This proportional configuration not only ensures a comfortable handling margin but also allows precise edge-to-edge alignment when applying multiple parallel lengths of caulking tape 102. Specifically, adjacent sections of caulking tape 102 can be applied side by side such that the outer edge 109 of one section abuts the outer edge of an adjacent section. When the cover strips 104 are later removed, the resulting exposed gaps between the masking tape strips 103 are equally spaced. This property is particularly beneficial where multiple uniform lines of filler material are desired, such as in decorative tiling, multi-panel installations, or line marking applications. The equal extension of the cover strip beyond both sides ensures that consecutive runs of tape can be applied with consistent alignment and gap spacing across a broad surface.

[0043] The configuration of the overlapping edges 109 also assists in guiding the tape during application. When pressing the tape into position across a joint, the extended edges provide a visual and tactile reference for maintaining straight alignment relative to the substrates 112. The transparent nature of the cover strip 104 allows the installer to verify that the gap 106 lies precisely over the joint, while the outerextensions act as straight-edge guides along the visible surface, helping to maintain a continuous, straight bead of filler material once applied.

[0044] In use, these dimensional and structural relationships between the masking tape strips 103, the nominal gap 106, and the overlapping edges 109 of the transparent cover strip 104 allow the caulking tape 102 to be applied rapidly, aligned precisely, and removed efficiently, while avoiding disturbance to the adhered masking surfaces and ensuring repeatable spacing for consecutive joints or multiple decorative lines.

[0045] The transparent cover strip 104 may be formed from a flexible plastic material to enable it to conform readily to the contours of the adjoining substrates 112 during application. In a particularly suitable form, the cover strip 104 may be made of a thin thermoplastic film such as polyethylene terephthalate (PET). PET film provides several desirable properties for this purpose, including transparency, tear resistance, and sufficient flexibility to allow the strip to bend smoothly along internal or external corners without permanent deformation. Other transparent polymeric materials, such as polypropylene, polyethylene, or polyester laminates, may also be used, provided they offer similar tensile strength and flexibility characteristics.

[0046] The masking tape strips 103 may be formed from a paper-based material, which offers a combination of surface conformability and controlled adhesive removal properties. This paper-based masking tape has the ability to tear cleanly and adhere temporarily without damaging the underlying surface when removed. In the context of the present system, the use of a paper-based material allows the masking tape strips 103 to conform closely to surface irregularities along the edge surfaces 114 of the substrates 112 while still being removable in a single peeling motion once the filler material 115 has partially cured. The porosity of the paper substrate may also improve adhesion consistency across both smooth and slightly textured surfaces.

[0047] The underside of the transparent cover strip 104 may include adhesive regions or continuous longitudinal adhesive lines located in positions corresponding to the masking tape strips 103. These adhesive lines adhere to the upper surfaces of the masking tape strips to maintain their spacing and alignment during manufacture,winding, and dispensing. The central portion of the cover strip 104, corresponding to the nominal gap 106, may remain substantially free of adhesive to ensure that it does not adhere to the substrates 112 when the tape is applied. Similarly, the outermost overlapping edges 109 may also be free of adhesive so that they can be lifted easily to initiate peeling of the cover strip without disturbing the masking tape strips 103. This configuration allows the cover strip to act as both a carrier and spacing element while ensuring smooth unrolling and clean separation during application.

[0048] The transparent cover strip 104 may further include a central line of weakness 110, as shown in Figure 2. This line of weakness may take the form of a crease, score, or line of perforations extending longitudinally along the central axis of the cover strip, generally aligned with the nominal gap 106. The central line of weakness 110 may allow the cover strip 104 to be folded or bent precisely at its midline, facilitating accurate application around internal and external corners. For example, when sealing the intersection between a wall and a benchtop or along a window frame, the installer may bend the tape along the crease so that each masking tape strip 103 adheres to the respective adjacent surface while the cover strip 104 spans the corner.

[0049] This foldable property enables the caulking tape 102 to maintain a consistent gap alignment through transitions between horizontal and vertical planes, or along irregular junctions where precise control of the filler bead is required. The central crease also assists in manual handling, providing a tactile reference line for aligning the tape accurately over the joint.

[0050] In this manner, the combination of flexible plastic material for the cover strip, paper-based construction for the masking tape strips, and differential adhesion between their respective bonding surfaces ensures reliable performance during both application and removal. The assembly provides a balance between structural integrity when wound on the roll 101 and compliance when applied to varied substrate geometries, supporting both straight and corner sealing operations without additional accessories or spacer tools.

[0051] The caulking tape 102 may be wound on the cylindrical roll 101 such that the transparent cover strip 104 forms the outermost layer. In this arrangement, the masking tape strips 103 are protected beneath the cover strip 104, preventing their adhesive undersides from contacting adjacent layers of tape. This configuration may eliminate the need for a separate backing or divider strip and ensures that the tape can be unwound smoothly without sticking or tearing. Because the cover strip 104 typically comprises a smooth polymeric surface, it may act as a release layer, allowing the tape to unwind evenly under moderate tension. The roll 101 may be provided with a cardboard or polymeric core 105 and may be dimensioned to fit standard hand-held tape dispensers or to be manually applied along a surface.

[0052] The underside of the transparent cover strip 104 may incorporate two continuous adhesive lines aligned with the masking tape strips 103. These longitudinal lines may extend the full length of the tape to secure the masking tape strips while leaving the central region 106 and outer edges 109 substantially free of adhesive. The arrangement ensures that only the adhesive lines contact the masking tape strips, preventing unintended adhesion to the substrates. The adhesive strength of the lines may be selected to be weaker than the adhesive on the underside of the masking tape strips 103, permitting the cover strip 104 to be peeled away smoothly once the masking tape strips are applied. This selective adhesive pattern assists in reliable dispensing, prevents the tape from sticking to itself on the roll, and facilitates clean removal in one continuous motion during use.

[0053] The transparent cover strip 104 may be designed to exhibit a degree of tear resistance, allowing it to withstand continuous peeling over long joint runs without elongation or tearing. The material composition and thickness of the cover strip 104 may be selected to maintain this property; for example, a PET film in the range of 25 to 50 microns thick may provide sufficient mechanical strength while preserving flexibility. The tear resistance of the cover strip also prevents premature breakage if the tape is pulled sharply during dispensing, ensuring the integrity of the spaced arrangement of the masking tape strips 103.

[0054] In some embodiments, the transparent cover strip 104 may include printed or embossed guide markings extending longitudinally along its outer surface. These markings may take the form of lines, dots, or other repeating visual indicators arranged parallel to the masking tape strips 103. The markings may assist the user in aligning the tape accurately along a joint or seam, particularly over long distances where visual reference points improve straightness and uniformity. The guide markings may be applied using ink, heat embossing, or laser etching techniques, and may be lightly tinted or opaque so that they are visible against the substrate without obscuring the joint beneath.

[0055] The cover strip 104 may also be configured to be removed in a single, continuous pulling action along the length of the applied tape. This continuous removal process allows the installer to peel the cover strip 104 progressively as filler material is applied into the exposed gap 113. The combination of the weaker adhesive between the cover strip and the masking tape strips, and the stronger adhesive on the underside of the masking tape strips 103, ensures that the cover strip detaches cleanly without lifting or curling the masking tape strips from the edge surfaces 114. The direction of peeling may be selected according to user preference, typically beginning from one end of the joint and proceeding in a steady motion parallel to the gap 113.

[0056] In a further embodiment, the masking tape strips 103 and transparent cover strip 104 may be co-extruded or laminated during manufacture to maintain precise and uniform spacing between the masking tape strips. Co-extrusion may involve feeding the masking tape and the polymeric cover strip through a lamination assembly that bonds them with controlled adhesive deposition, ensuring consistent lateral spacing across the tape width. This manufacturing approach may reduce variability between production batches and improve repeatability of the nominal gap 106. Alternatively, a lamination process may use a positioning jig or guide rollers that set the separation between the masking tape strips before the cover strip 104 is pressed into place, allowing accurate control over the width of the non-adhesive central region.

[0057] The use of co-extrusion or lamination also simplifies the overall manufacturing process, reducing the need for secondary assembly operations such as manual alignment or adhesive coating after initial fabrication. This may provide uniformity in both the mechanical behaviour of the tape and its visual appearance when applied, thereby improving precision in the resulting caulk or filler joints across various installation contexts.

[0058] Referring to Figures 3a through 3d, an exemplary method of use of the caulking tape system 100 will now be described with reference to several common joint preparation and sealing scenarios, including use with glass panel junctions, external wall cladding systems, tiled surfaces, control joints, and joints requiring epoxy-based filler materials. The described method is applicable to both internal and external corner configurations and may be varied according to the joint geometry and the type of filler material selected.

[0059] Prior to application of the caulking tape 102, the adjacent substrates 112 defining the gap 113 should be cleaned to remove dust, oil, and other contaminants that may interfere with adhesion of the masking tape strips 103. In the case of glass panels or smooth composite cladding boards, cleaning with an alcohol-based solvent may be preferable to ensure a residue-free surface. For masonry, fibre-cement, or other porous surfaces, any loose particles may be brushed or blown away, and the joint may be lightly wiped with a damp cloth to remove fine dust. Where the gap 113 is deep or of significant width, a compressible backing rod may be inserted beforehand to control the depth of the filler material 115.

[0060] For applications involving glass or other smooth panels, the caulking tape 102 may be unrolled directly from the cylindrical roll 101 and positioned along the junction between adjacent panels. The transparent cover strip 104 allows precise visual alignment so that the central gap 106 lies exactly over the seam between the panels. The masking tape strips 103 are pressed firmly against the glass surfaces along the edge regions, ensuring good adhesion without entrapped air bubbles. The flexible nature of the cover strip 104 permits the tape to follow gentle curves, as may occur at glass fagade transitions or curved balustrade edges. Once correctly positioned, thecover strip 104 is peeled away by lifting an overlapping edge 109 and drawing the strip rearwardly along its length, leaving the masking tape strips 103 adhered to the glass surfaces and exposing the joint for caulking.

[0061] In external wall cladding systems, such as those employing large fibre-cement or aluminium composite panels, the caulking tape 102 may be applied along both vertical and horizontal joints to form continuous weatherproof seals. The tape may be supplied in rolls having a nominal gap 106 of approximately 11 mm, suitable for the wider expansion joints typical in fagade applications. The installer may unroll the tape along the panel edges, ensuring that the masking tape strips 103 adhere evenly to both sides of the joint while the cover strip 104 spans the open gap. The transparency of the cover strip assists in maintaining linear continuity across multiple panels. When working in external conditions, the tear-resistant cover strip 104 resists wind displacement and mechanical stretching during alignment. After the cover strip 104 is removed, an elastomeric caulking compound may be applied into the gap 113 using a caulking gun. The masking tape strips 103 confine the compound neatly to the joint area, preventing smearing onto visible cladding surfaces. Once the filler material 115 has begun to cure, the masking tape strips 103 are peeled away in a single motion to reveal a straight, clean joint line with sharp boundaries.

[0062] When sealing joints between ceramic or stone tiles, a narrower nominal gap 106 — typically about 3 mm — may be selected. The caulking tape 102 may be used to mask adjacent tile edges during grouting or epoxy filler application. The tape is placed so that the central gap 106 overlays the tile joint, and the masking tape strips 103 adhere to the glazed or honed surfaces of the tiles. After removing the cover strip 104, grout or epoxy filler material 115 is worked into the exposed joint using a trowel or applicator. Because the masking tape strips 103 define an exact boundary, the filler does not spread over the tile surfaces, substantially reducing cleanup time and eliminating surface haze. Once the filler material has firmed slightly, the masking tape strips 103 are lifted away, leaving a crisp, uniform joint between the tiles.

[0063] For control joints in concrete or masonry, where a more flexible sealant is required to accommodate movement, the tape may again be applied with theappropriate nominal gap 106, often between 6 mm and 11 mm depending on joint width. The caulking tape 102 ensures that sealant is confined to the joint recess and that the finished bead presents a consistent width and profile. The removable cover strip 104 also protects the joint during alignment or pre-filling operations, allowing the installer to expose only the length to be immediately sealed, which can be advantageous in windy or dusty environments.

[0064] In applications involving internal or external corners, the caulking tape 102 may be used in conjunction with the cover strip’s central line of weakness 110. The installer may lightly crease the cover strip 104 along this line before applying it so that the masking tape strips 103 naturally fold to conform with the two intersecting surfaces. For example, when sealing the junction between a wall and a floor, the folded tape may be pressed so that one masking tape strip 103 adheres to the wall and the other adheres to the floor, with the central gap 106 positioned precisely along the corner line. Similarly, for an external corner, the tape may be folded outwardly along the same crease to maintain even spacing of the masking tape strips across the corner edge. Once the tape is in position, the cover strip 104 may be peeled away as before, and filler material 115 applied smoothly along the exposed gap 113.

[0065] In epoxy grouting operations, where the filler material may have a higher viscosity and shorter working time than conventional sealants, the caulking tape 102 offers particular benefit. The masking tape strips 103 define the working boundaries of the joint, allowing rapid and accurate placement of the epoxy compound. The smooth polymeric surface of the cover strip 104 and the paper-based masking tape material resist adhesion of cured epoxy, ensuring that excess material can be easily removed with the tape once application is complete.

[0066] Through these varied applications, the system may be employed across a wide range of substrates and environments — both interior and exterior — while maintaining control over joint width, filler containment, and the cleanliness of the visible surfaces. The flexibility, transparency, and adhesive balance of the components allow the installer to achieve consistent results across differing joint geometries without the need for specialised tools or separate alignment aids.

[0067] The described embodiments provide a practical and precise means for forming consistently uniform joints between adjacent substrates while reducing the complexity and variability typically associated with manual masking or freehand caulking techniques. The arrangement of the masking tape strips 103 and transparent cover strip 104 on a single, flat, rollable assembly allows the installer to apply, align, and remove the system efficiently using only one hand, without needing to position separate strips or spacers along the joint.

[0068] Because the caulking tape 102 is dispensed in a planar configuration from the cylindrical roll 101, it remains free from twisting or folding, enabling accurate placement along long, continuous seams such as those found in fagade systems, tiled walls, or glazing assemblies. The transparent nature of the cover strip 104 facilitates precise alignment by allowing the user to view the underlying joint or surface through the tape during application. This contributes to a consistently straight joint line even when working along uneven or angled surfaces.

[0069] The use of different nominal gap widths provides adaptability across multiple construction environments. Narrower configurations may be used for fine grout lines in interior finishes, whereas wider spacings accommodate movement joints or external sealing work. The dimensionally stable cover strip 104 ensures that this spacing remains constant along the full roll length, providing predictable joint widths without reliance on operator skill.

[0070] The adhesive relationship between the cover strip 104 and masking tape strips 103 further enhances performance during both application and removal. The cover strip 104 may maintain sufficient tack to carry the masking tape strips 103 in correct alignment as the tape is unrolled, yet its adhesion is weaker than that of the masking tapes, allowing it to be removed smoothly without disturbing their placement. This property eliminates the need for separate divider layers, simplifying manufacture and minimising material waste.

[0071] Optional extended edges 109 of the cover strip provide a convenient handling feature for initiating peeling without lifting the masking tape strips. The ability to align multiple runs of tape edge-to-edge with equal spacing allows uniform patterning fordecorative finishes or sequential sealing lines, producing a professional result even when performed by non-specialist installers.

[0072] The optional flexible yet tear-resistant composition of the cover strip 104 enables the system to adapt to internal and external corners, curved edges, and other irregular geometries, maintaining continuous sealing without interruption. The central crease 110 provides an exact folding reference, ensuring the joint alignment remains central when the tape is applied around corners.

[0073] In operation, the masking tape strips 103 prevent filler material 115 from spreading onto the exposed faces of the substrates 112, eliminating the need for postapplication cleaning and reducing overall labour time. After partial curing, the masking tape strips can be peeled away cleanly, removing any surplus material and leaving a sharply defined boundary to the filler joint.

[0074] Through this cooperative structure, the system may deliver predictable sealing and aesthetic consistency across a wide range of joint materials and conditions. It can be manufactured in continuous lengths using scalable lamination or co-extrusion processes, packaged conveniently on rolls, and applied using straightforward manual techniques, thereby combining precision, simplicity, and durability in a single integrated assembly.

[0075] The foregoing description, for purposes of explanation, used specific nomenclature to provide a thorough understanding of the invention. However, it will be apparent to one skilled in the art that specific details are not required in order to practise the invention. Thus, the foregoing descriptions of specific embodiments of the invention are presented for purposes of illustration and description. They are not intended to be exhaustive or to limit the invention to the precise forms disclosed as obviously many modifications and variations are possible in view of the above teachings. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, thereby enabling others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. It is intended that the following claims and their equivalents define the scope of the invention.

Claims

Claims1. A caulking tape system comprising:adjacent substrates defining a gap between respective edge surfaces;a cylindrical roll of caulking tape, the caulking tape comprising:a pair of masking tape strips held in spaced-apart parallel arrangement by a wider transparent cover strip, the cover strip having an adhesive underside configured to adhere to upper surfaces of the masking tape strips, each masking tape strip having an adhesive underside configured for adherence to the respective edge surfaces in use, the masking tape strips being spaced apart by a nominal gap defined by a central region of the cover strip between the masking tape strips, the nominal gap being selected according to a width of the gap between the adjacent substrates;wherein the masking tape strips are not connected directly to one another by any portions bridging therebetween and are joined only by the transparent cover strip, and wherein the caulking tape includes no additional removable divider, backing, or bridging strip between the masking tape strips;wherein the caulking tape is retained flat on the roll so as to be dispensable therefrom in a planar formation; andwherein, in use, the caulking tape is dispensed flat from the roll such that the masking tape strips are pressed against and adhered to the edge surfaces of the adjacent substrates while maintaining central alignment by viewing the gap through the transparent cover strip, the transparent cover strip being peelable away to leave the masking tape strips adhered in place, caulking material being thereafter applied into the gap, and the masking tape strips being subsequently removable together with any excess caulking material to leave a clean caulk joint.

2. The caulking tape system of claim 1, wherein the nominal gap between the masking tape strips is approximately 3 mm for use with grout or epoxy filler materials between adjacent substrates.

3. The caulking tape system of claim 2, wherein the nominal gap between the masking tape strips is approximately 6 mm for use with caulking joints at 90-degree corner surfaces.

4. The caulking tape system of claim 3, wherein the nominal gap between the masking tape strips is approximately 11 mm for use with external cladding or brickwork expansion joints.

5. The caulking tape system of claim 4, wherein outer edges of the transparent cover strip extend beyond respective outer edges of the masking tape strips to facilitate lifting and removal of the cover strip without disturbing adhesion of the masking tape strips.

6. The caulking tape system of claim 5, wherein the transparent cover strip extends beyond each respective outer edge of the masking tape strips by a width approximately half of that defined between the masking tape strips.

7. The caulking tape system of claim 6, wherein the extension of the transparent cover strip beyond the masking tape strips enables adjacent caulking tape sections to be aligned edge-to-edge such that, upon removal of the cover strips, the gaps between respective masking tape strips are equal, permitting multiple parallel joints to be formed with uniform spacing.

8. The caulking tape system of claim 7, wherein the transparent cover strip is formed from a flexible plastic material.

9. The caulking tape system of claim 8, wherein the transparent cover strip is formed from polyethylene terephthalate (PET).

10. The caulking tape system of claim 9, wherein the masking tape strips are formed from a paper-based material.

11. The caulking tape system of claim 10, wherein the transparent cover strip comprises an adhesive weaker than that of the masking tape strips such that removal of the cover strip does not lift the masking tape strips from the surfaces.

12. The caulking tape system of claim 11 , wherein the transparent cover strip includes a central line of weakness, crease, or perforation to facilitate bending of the tape along internal or external corners during application.

13. The caulking tape system of claim 12, wherein the caulking tape is wound on the roll such that the transparent cover strip forms the outermost layer.

14. The caulking tape system of claim 13, wherein the underside of the transparent cover strip comprises adhesive portions that adhere to upper surfaces of the masking tape strips such that, when the caulking tape is dispensed from the roll, the masking tape strips are carried together with the cover strip in a fixed spaced-apart arrangement.

15. The caulking tape system of claim 14, wherein the transparent cover strip is tear resistant to maintain integrity when peeled away after the masking tape strips are adhered.

16. The caulking tape system of claim 15, wherein the transparent cover strip includes printed or embossed guide markings parallel to the masking tape strips to assist in alignment along the joint.

17. The caulking tape system of claim 16, wherein the transparent cover strip is configured to be removed in a single continuous pulling action along the roll length without lifting the masking tape strips from the edge surfaces.

18. The caulking tape system of claim 17, wherein the masking tape strips and transparent cover strip are co-extruded or laminated in a manufacturing process that maintains consistent spacing between the masking tape strips.

19. The caulking tape system of claim 1, wherein the central region of the transparent cover strip aligned with the nominal gap is substantially free of adhesive to prevent adhesion to the substrates during application and to facilitate smooth unrolling of the caulking tape from the roll.

20. The caulking tape system of claim 19, wherein outer edge portions of the transparent cover strip extending beyond the masking tape strips are also substantially free of adhesive so that they do not adhere to the substrates during use.

21. The caulking tape system of claim 20, wherein longitudinal adhesive lines are provided on the underside of the transparent cover strip in positions corresponding to the masking tape strips so that the adhesive lines adhere to upper surfaces of the masking tape strips while leaving the central region and any outer edge portions of the transparent cover strip substantially free of adhesive.

22. The caulking tape system of claim 21, wherein the longitudinal adhesive lines extend continuously along the length of the transparent cover strip to maintain fixed spacing between the masking tape strips during winding, storage, and dispensing of the caulking tape.

23. The caulking tape system of claim 22, wherein the adhesive of the longitudinal lines exhibits a bond strength weaker than that of the adhesive on the undersides ofthe masking tape strips so that the transparent cover strip can be peeled away without detaching the masking tape strips from the substrates.

24. A method of forming a joint between adjacent substrates using the caulking tape system of claim 1, the method comprising the steps of:applying the caulking tape across a gap between edge surfaces of the adjacent substrates so that the masking tape strips adhere respectively to the edge surfaces while the transparent cover strip spans the gap;removing the transparent cover strip to expose a channel defined between the masking tape strips;dispensing filler material into the channel to occupy the gap between the adjacent substrates; andremoving the masking tape strips after partial curing of the filler material to leave a clean, uniformly bounded joint.

25. The method of claim 24, wherein prior to applying the caulking tape, the edge surfaces of the substrates are cleaned to remove dust, oil, or other contaminants to improve adhesion of the masking tape strips.

26. The method of claim 24, wherein the caulking tape is dispensed from the cylindrical roll while maintaining it in a planar formation, the masking tape strips being simultaneously applied in their spaced-apart arrangement as the tape is unrolled.

27. The method of claim 24, wherein the transparent cover strip is peeled away by lifting an overlapping outer edge of the cover strip and drawing it rearwardly along the length of the joint while leaving the masking tape strips adhered to the substrates.

28. The method of claim 24, wherein the filler material is dispensed into the exposed channel through a nozzle or caulking gun, the masking tape strips preventing overflow of the filler material onto visible surfaces of the substrates.

29. The method of claim 28, wherein after the filler material has been applied, the surface of the filler material is smoothed using a tool or blade before the masking tape strips are removed.

30. The method of claim 29, wherein the masking tape strips are peeled away after partial curing of the filler material, removing with them any excess filler material deposited adjacent the edges of the joint.

31. The method of claim 24, wherein the caulking tape is applied to internal or external corners by folding the transparent cover strip along a central line of weakness such that the masking tape strips adhere to intersecting surfaces of the substrates.

32. The method of claim 24, wherein the nominal gap between the masking tape strips is selected according to the intended application, including approximately 3 mm for grout joints, approximately 6 mm for corner caulking, and approximately 11 mm for external or expansion joints.

33. The method of claim 24, wherein the caulking tape is applied in successive parallel lengths, the outer edges of the transparent cover strips of adjacent lengths being aligned to produce multiple joints of uniform spacing after the cover strips are removed.

34. The method of claim 24, wherein the caulking tape is used for forming joints between glass panels, between external cladding sections, between tiles, or along control joints in masonry or concrete substrates.

35. The method of claim 34, wherein the filler material comprises a sealant, grout, silicone, polyurethane, epoxy, or equivalent curable composition selected according to the joint type and exposure conditions.

36. The method of claim 24, wherein the caulking tape is progressively peeled from the roll and applied along the joint while simultaneously pressing the masking tape strips onto the edge surfaces of the substrates, enabling continuous sealing along extended joint lengths.

37. The method of claim 24, wherein the transparent cover strip is removed in a single continuous pulling action along the length of the joint prior to or during dispensing of the filler material.

38. The method of claim 24, wherein the caulking tape is applied to external fagades, tiled surfaces, or glazing systems to produce uniform, residue-free joints with visually straight boundaries.

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