The invention belongs to the technical field of sealants and particularly relates to a high-strength 
silane-modified polyether 
sealant for automobiles and a preparation method thereof. The high-strength 
silane-modified polyether 
sealant for automobiles comprises, by weight, 25-60 parts of a 
silane-modified polyether resin, 5-20 parts of an environment-friendly 
plasticizer, 15-30 parts of a bulkingfiller, 10-30 parts of reinforcing 
carbon black, 0-1 part of a thixotropic agent, 0-1 part of a 
UV absorber, 0-1 part of a light stabilizer, 0-2 parts of an 
antioxidant, 0-4 parts of a water removalagent, 0.2-0.8 parts of an adsorbent, 0.1-4 parts of a curing accelerator, 0.1-2 parts of an adhesion 
promoter and 0-1 part of a catalyst. The high-strength silane-modified polyether 
sealant solves the problem that the traditional silane-modified polyether sealant has low mechanical properties, improves the complicated construction process of the 
polyurethane sealant for the traditional windshieldglass, realizes primerless bonding, solves the problem that the 
polyurethane sealant for the traditional 
windshield glass produces foam at a high temperature and 
high humidity and solves the problemthat the 
polyurethane sealant for the traditional 
windshield glass has poor environmental friendliness.