Disclosed are a curable
silicone resin composition, a cured product thereof, and the opaque
silicone adhesive sheet formed from the conposition. The curable
silicone resin composition is
solid at roomtemperature, the composition including: (A) an organopolysiloxane having a resin structure consisting of specific
siloxane units, (B) an organohydrogenpolysiloxane having a resin structure consistingof specific
siloxane units, (C) a
platinum group
metal-based catalyst, (D) either one or both of an opaque
pigment and an opaque dye, and (E) a reaction
retarder, in which a layer of thickness 100 [mu]m formed from a cured product of the composition exhibits a light
transmittance of not more than 5% across the entire visible light range. The composition is
solid at
room temperature and thereforeeasy to
handle. Further, the composition is useful for producing an opaque
silicone adhesive sheet. A cured product obtained by curing the composition can be used to protect a
liquid crystal electrodeand shield the
electrode from light, thereby preventing malfunction of the driver IC, and also exhibits excellent mechanical properties and flexibility, and displays minimal surface tack.