MTES
Methyltriethoxysilane · ≥ 99%
At a glance
What it does
Methyltriethoxysilane (MTES) — a monofunctional alkyl silane used as a co-active in silane-siloxane hydrophobic blends and sol-gel systems, and as a surface modifier for mineral fillers and pigments. Not used as a standalone impregnation active in Class W systems; typically pairs with OCTEO / OTES for concrete and masonry protection.
Also known as
methyltriethoxysilane · MTES · MTEOS · CAS 2031-67-6 · EC 217-983-9 · HS 2931 90 80
Typical applications
- Co-active in silane-siloxane hydrophobic blends (masonry / concrete protection)
- Sol-gel systems and hybrid coatings (co-precursor with TEOS or other silanes)
- Surface treatment of precipitated and fumed silica
- Mineral filler and pigment surface modification (calcium carbonate, talc, kaolin) for plastics and rubber
- Crosslinker in moisture-cure silicone systems
Specification band
Industry-typical published bands. Producer-specific values on the COA issued per shipment.
Handling & packaging
- Highly moisture-sensitive · sealed drum, N₂ blanket maintained
- Flammable liquid · Class 3 dangerous goods (UN 2924, packing group II/III grade-dependent)
- Shelf life 12 months in original sealed packaging
Documents on file per shipment
Serica execution notes
- Hermetic drum integrity verified pre-shipment — moisture ingress is the single failure mode for this grade.
- ADR Class 3 declaration and segregation coordinated on the Europe-side leg.
- Single technical contact across the four silane families. Delivered pricing quoted to your plant; Incoterm and contracting structure confirmed per quotation.
Producers develop custom grades on request — specification band, particle size, purity, additive package.
Send us what you use today; we return a specification match and an indicative net delivered cost.
Prices are quoted as a net delivered cost to your plant. MOQs, lead-times and producer identities are confirmed per buyer.