3-Aminopropyltrimethoxysilane is a chemical compound with the formula. It is used as a coupling agent in various applications, particularly in the field of surface modification and coatings. This silane compound is valued for its ability to improve adhesion between organic materials (such as polymers) and inorganic surfaces (such as glass or metal), due to its silane group that can bond with both types of materials. This property makes it useful in adhesives, sealants, and coatings, where enhanced bonding strength is required. Additionally, it finds application in industries such as construction, automotive, and electronics for its versatility in modifying surface properties.