SIA 0540.0 Allyltrimethoxysilane 2551-83-9 Gelest Adhesion Promoters Silicones (Si) SEALANT ADHESIVE Allyltrimethoxysilane. Used as adhesion promoter for vinyl-addition silicones. Hydrolytic stability: 7 Si-OR reacts with water/moisture Allyltrimethoxysilane. Used as adhesion promoter for vinyl-addition silicones. Possesses hydrolytic stability.