Ethoxytriethylsilane is primarily used as a reagent in organic synthesis, particularly in the protection of hydroxyl groups during complex chemical reactions. It acts as a silylating agent, forming stable silyl ethers that shield reactive hydroxyl groups from unwanted interactions. This makes it valuable in the production of pharmaceuticals, where selective protection and deprotection of functional groups are crucial. Additionally, it finds application in the modification of surfaces, such as glass or silica, to impart hydrophobic properties, enhancing their performance in various industrial processes. Its role in crosslinking and curing in silicone-based materials also makes it useful in coatings and adhesives industries.