Tetrabutyl orthosilicate

Tetrabutyl orthosilicate (CAS 4766-57-8), also known as tetrabutyl silicate, is a reactive alkoxysilane used as a crosslinker and surface modifier across coatings, construction, and polymer systems. It hydrolyzes under moisture to form silica networks, enabling durable bonding and surface consolidation in demanding industrial applications. In protective coatings and sealants, it functions as a crosslinking agent.

This material builds chemical resistance and improves adhesion to mineral and glass substrates. The construction industry uses it as a stone and concrete consolidant for various projects. Controlled hydrolysis reinforces porous surfaces without altering appearance. In silicone elastomer formulations, it acts as a curing agent and chain extender, influencing network density and mechanical performance.

Adhesive formulators incorporate it to improve substrate wetting and promote chemical bonding at interfaces. This occurs between organic and inorganic materials to ensure long-term stability. Tetrabutyl orthosilicate is supplied as a clear liquid. It is available in technical grade, with purity levels typically at 97–99% for industrial use and large scale manufacturing.

Standard packaging ranges from drums to IBC containers, with bulk supply available for high-volume coating. It is ideal for construction chemical manufacturers requiring consistent quality.