Used as a coupling agent to improve adhesion between organic and inorganic materials, especially in coatings, sealants, and composite systems. The cyano group allows further chemical modification or participation in polymerization reactions, while the trimethoxysilane end bonds effectively to surfaces like glass, metals, and minerals. Commonly applied in surface treatment of fillers for plastics, enhancing dispersion and mechanical properties. Also utilized in specialty adhesives and as a precursor for functionalized silica or silicones where polar interactions or chemical grafting are required.