Isobutyltriethoxysilane

Isobutyltriethoxysilane (CAS 17980-47-1) is an organosilane coupling agent commercially available under trade names including Dynasylan IBTEO, Dynasylan BSM 40N, and Z 6403. It carries EC number 402-810-3 and is classified under HS code 29319090 within the silicones and silicates category.

In building and construction sealants, it functions as a crosslinker by reacting with moisture to form siloxane networks that bond organic polymers to inorganic substrates such as glass and concrete. In coatings and adhesive formulations, the isobutyl group provides hydrophobic character at treated surfaces, improving water repellency and adhesion durability under wet conditions.

Isobutyltriethoxysilane is supplied as a liquid and is subject to REACH registration requirements within the European Economic Area. No E-code or food-grade designation applies to this substance. Procurement teams should confirm purity grade and packaging format directly with the supplier, as specifications vary by manufacturer.