Used as a coupling agent in composite materials to improve adhesion between organic polymers and inorganic surfaces such as glass, metals, and minerals. Commonly applied in sealants, coatings, and adhesives to enhance durability and moisture resistance. Facilitates better dispersion of fillers in rubber and plastic formulations, improving mechanical properties. Also employed in the treatment of glass fibers and mineral fillers for use in reinforced plastics. Its reactivity allows for covalent bonding in hybrid organic-inorganic systems, making it valuable in sol-gel processes and surface modification.