Triethoxy(octyl)silane is widely used as a coupling agent in the modification of surfaces, particularly in enhancing the adhesion between organic polymers and inorganic materials. It is applied in coatings and sealants to improve water repellency and durability, making it valuable in construction and automotive industries. Additionally, it serves as a surface treatment for glass, ceramics, and metals to increase their resistance to moisture and corrosion. In the production of nanocomposites, it aids in the dispersion of nanoparticles within polymer matrices, improving mechanical properties. Its hydrophobic nature also makes it suitable for use in waterproofing applications for textiles and paper.