- ▸ Silicone crosslinker: Cure agent for one-part RTV silicone systems.
- ▸ Sealant cure: Crosslinks construction and industrial silicone sealants.
- ▸ Adhesive cure: Moisture-curing agent in silicone adhesives.
- ▸ Waterproofing: Component of silicone-based waterproofing systems.
A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.
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Transport classification per the UN Model Regulations / 49 CFR 172.101 Hazardous Materials Table. Confirm against the grade-specific SDS (Section 14) before shipping.
Ethyltriacetoxysilane (CAS 17689-77-9) is an acetoxy-functional organosilane used as a crosslinker for one-part RTV silicone systems. On exposure to moisture it hydrolyzes and condenses, curing silicone sealants and adhesives while releasing acetic acid.
Frequently Asked Questions
What is ethyltriacetoxysilane used for?
Ethyltriacetoxysilane (CAS 17689-77-9, C8H14O6Si) is an acetoxy-functional organosilane used as a crosslinker for one-part RTV silicone systems. It cures silicone sealants and adhesives — including construction sealants and waterproofing systems — on exposure to atmospheric moisture.
How does ethyltriacetoxysilane cure silicone?
On exposure to moisture it hydrolyzes and condenses, forming the crosslinks that cure the silicone polymer. The reaction releases acetic acid, which is the characteristic vinegar odor of acetoxy-cure (RTV) silicones.
What is the difference between ethyltriacetoxysilane and methyltriacetoxysilane?
Both are acetoxy-functional crosslinkers for one-part RTV silicones that release acetic acid on cure. They differ in the organic group on silicon (ethyl vs. methyl), which affects cure profile and compatibility. They are often used together or selected by formulation; confirm the grade required for your system.
What is the CAS number and HS code for ethyltriacetoxysilane?
The CAS number is 17689-77-9 and the molecular formula is C8H14O6Si. It is classified under HS 2931.90, other organo-inorganic compounds.
What is the cost of bulk ethyltriacetoxysilane?
Bulk pricing depends on grade, volume, packaging, and delivery location. Because acetoxysilanes are moisture-sensitive, packaging and handling specifications matter — request a quote with your volume and CoA/SDS requirements for delivered pricing.