Used as a coupling agent in composite materials to improve adhesion between organic polymers and inorganic surfaces, especially in glass fiber-reinforced plastics. Commonly applied in sealants and adhesives to enhance wet strength and moisture resistance. Serves as a surface modifier for mineral fillers in rubber and plastics, improving dispersion and mechanical properties. Also utilized in the production of silicone resins and as a precursor for silica-based coatings through hydrolysis and condensation reactions. Plays a role in the manufacturing of water-repellent treatments for construction materials like concrete and stone.