1. Used for the surface treatment of glass fiber, which can improve the bonding performance of glass fiber and resin, and greatly improve the strength, electrical, water resistance and weather resistance of glass fiber reinforced composite materials. The improvement of the material's mechanical properties is also very significant. The use of silane coupling agents in glass fiber has been quite common. The silane coupling agents used in this area account for about 50% of its total consumption. Among them, the most commonly used varieties are vinylsilane, aminosilane, Acryloyloxysilane and the like. 2. For inorganic filler filled plastics. The filler can be surface-treated in advance or directly added to the resin. Can improve the dispersion and adhesion of fillers in resins, improve process performance and improve mechanical, electrical, and weather resistance properties of filled plastics (including rubber). 3. Used as a tackifier for sealants, adhesives and coatings, which can improve their bonding strength, water resistance and weather resistance. Silane coupling agents can often solve the problem that some materials have not been able to bond for a long time.