Used as a surface modifier in the production of silica-based materials, enhancing hydrophobicity and improving compatibility with organic matrices. Commonly applied in coatings, sealants, and adhesives to promote water resistance and durability. Acts as a coupling agent in composites, improving the bond between inorganic fillers and polymer resins. Also utilized in the synthesis of specialty siloxane polymers and as a reagent in moisture-curable formulations.