Isobutyltrimethoxysilane

Isobutyltrimethoxysilane (CAS 18395-30-7) is an organosilane monomer used to modify inorganic surfaces and improve compatibility between mineral substrates and organic polymer matrices.

Where is Isobutyltrimethoxysilane used?

• Coatings and sealants: surface modifier for silica
• Construction sealants: crosslinking agent
• Plastics compounding: treats reinforcing fillers to improve mechanical performance and long-term durability
• Electronics: surface treatment for encapsulants and underfill materials where controlled hydrophobicity and adhesion are critical
• It enhances adhesion to glass, concrete, and metal substrates.

Good to know: Buyers sourcing for sensitive electronics or high-performance polymer applications should confirm purity specifications and moisture content with the supplier. Proper storage in a cool, dry environment is essential to maintain stability.

Commercial specifications

• Purity levels typically at 97% or higher
• Clear liquid in standard packaging ranging from drums to IBC containers