Isobutyltriethoxysilane is widely used as a coupling agent in the production of composite materials. It enhances the adhesion between organic polymers and inorganic substrates, making it valuable in the manufacturing of reinforced plastics, coatings, and adhesives. In the construction industry, it is applied to improve the water repellency and durability of concrete and masonry surfaces. Additionally, it serves as a surface modifier in the production of fillers and pigments, ensuring better dispersion and stability in various formulations. Its ability to form strong bonds with substrates also makes it useful in the treatment of glass fibers for fiberglass composites, improving mechanical properties and resistance to environmental factors.