Used as a surface modifier in coatings and adhesives to improve adhesion between organic polymers and inorganic substrates like glass, metal, and ceramics. The trichlorosilane group bonds strongly to hydroxylated surfaces, while the polyethyleneoxy chain provides hydrophilicity and compatibility with organic matrices. Commonly applied in specialty coatings for optical fibers, anti-fog treatments, and moisture-curable formulations. Also used in the formulation of release agents and as a coupling agent in composite materials to enhance durability and moisture resistance.