Methyltriethoxysilane

Methyltriethoxysilane (CAS 2031-67-6), also known as MTES or by the trade designation A-162, is an organosilane monomer used to modify surfaces and crosslink polymer networks.

Where is Methyltriethoxysilane used?

• Coatings and sealants: crosslinking agent and water-repellent surface modifier for architectural, automotive, and industrial protective systems
• Electronics: filler and substrate treatment improving adhesion and moisture resistance in encapsulants
• Silicone elastomers: chain-end blocker or crosslinker influencing cure rate and network density
• Personal care: conditioning and film-forming systems requiring controlled hydrophobicity
• It bridges organic and inorganic chemistries, enabling durable bonding between incompatible substrates.

Commercial specifications

• Technical grade: purity 97% or higher
• Specialty grades: tighter purity thresholds for electronics and precision coatings, with strictly controlled trace metal content
• Clear liquid in drums to ISO tank containers