Used as a coupling agent in surface modification of inorganic materials, particularly in the treatment of glass fibers and mineral fillers for composites. Enhances adhesion between organic polymers and inorganic substrates by forming stable bonds on surfaces, improving mechanical strength and moisture resistance in resin systems. Commonly applied in sealants, adhesives, and reinforced plastics. Also serves as an intermediate in the synthesis of silane-based crosslinking agents and functional coatings.