(3-Aminopropyl) trimethoxysilane is widely used as a coupling agent in various industries. It enhances adhesion between organic polymers and inorganic materials, making it valuable in coatings, adhesives, and sealants. In the automotive and construction sectors, it improves the bonding of paints, primers, and composites to surfaces like glass, metals, and ceramics.

It is also utilized in the production of reinforced plastics, where it strengthens the interface between fibers and resin matrices. In electronics, it serves as a surface modifier for semiconductors and fillers, improving performance and durability. Additionally, it acts as a precursor in the synthesis of functionalized nanoparticles and silane-based coatings for corrosion protection.

In the medical field, it is employed to modify surfaces of biomaterials, enhancing biocompatibility and promoting cell adhesion. Its versatility makes it a key component in diverse applications across multiple industries.