▎ 摘　　要

NOVELTY - Sealant comprises 100-120 pts. wt. silane-terminated polyether polymer, 20-40 pts. wt. modified graphene, 20-40 pts. wt. aluminum hydroxide, 5-8 pts. wt. cage octahydroxy-polysilsesquioxane, 3-6 pts. wt. dehydrating agent, 2-3 pts. wt. thixotropic agent, 1-3 pts. wt. adhesion promoter and 1-2 pts. wt. catalyst. USE - The sealant is used in automobile. ADVANTAGE - The sealant solves the difference of existing sealants, uses silane groups as skeleton materials to form a connection and curing structure based on silane active groups, has excellent weather resistance and water resistance, and excellent flame retardancy. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing the sealant involving (a) adding silane-terminated polyether polymer, modified graphene, aluminum hydroxide, cage octahydroxyl-polysilsesquioxane and stirring evenly to obtain a mixture, and (b) adding dehydrating agent, thixotropic agent, adhesion promoter and catalyst into the mixture and stirring evenly to obtain the product.