Dow Corning OFS-6403 (isobutyltriethoxysilane) is a hydrophobic silane coupling agent that enhances adhesion and waterproofing in coatings and composites. Its small molecular structure enables deep penetration into concrete and metals, forming durable siloxane crosslinks for >90% wet adhesion retention. Ideal for high-transparency concrete and anti-corrosion coatings, it complies with REACH/RoHS and reduces VOC emissions (423 g/L). Applications include waterproof coatings, FRP composites, and cable insulation
Interfacial Reinforcement - Vinyl groups copolymerize with resins; methoxy links to fillers/glass fibers, optimizing stress transfer
Process Efficiency - Low viscosity (0.56 cSt at 25°C) ensures homogeneous dispersion in formulations
Durability - Enhances UV/aging resistance in coatings (salt spray resistance >1,000 hours)
Multi-Matrix Compatibility - Works with acrylic, epoxy, and polyurethane resin
Wire Insulation - Crosslinked polyethylene cables with improved dielectric properties
FRP Composites - Glass fiber sizing for automotive/construction parts (30% strength increase)
Industrial Coatings - Metal primers with enhanced corrosion resistance
Adhesives - UV-curable formulations with 0-level adhesion (ASTM D3359)
Chemical Name | Vinyltrimethoxysilane |
Appearance | Colorless to light yellow transparent liquid |
Molecular Weight | 148.23 |
Specific Gravity (25/25℃) | 0.968 g/mL |
Boiling Point | 123℃ |
Flash Point (Closed Cup) | 22℃ |
Active Content | 99% |
Viscosity (25℃) | 0.56 cSt |
Compatible Diluents | Alcohols and water |
Packaging | 20KG/drum |
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