Name: Evonik Dynasylan MTMS Methyltrimethoxysilane
Brand: Guangzhou Eric Wei Chemical Co., Ltd.

Features Of Evonik Dynasylan MTMS Methyltrimethoxysilane

Highly reactive alkoxysilane with three hydrolysable methoxy groups and one non-hydrolysable methyl group.
Excellent hydrophobization capability for mineral surfaces such as glass, silica, concrete, and limestone.
Low viscosity and high volatility enable efficient vapor-phase deposition and uniform surface coverage.
Forms stable, covalently bonded siloxane networks upon hydrolysis and condensation.
Compatible with organic solvents and widely used in hybrid organic-inorganic formulations.

Typical Applications Of Evonik Dynasylan MTMS Methyltrimethoxysilane

Water repellents for construction materials including concrete, mortar, and natural stone.
Surface modifiers in silica-based fillers and pigments for improved dispersion in polymer matrices.
Key precursor in sol-gel synthesis of hydrophobic silica aerogels and coatings.
Adhesion promoters in sealants, adhesives, and elastomeric composites.
Vapor-phase treatment agent for MEMS and optical components requiring ultra-thin, conformal hydrophobic layers.

Chemical Type	Organofunctional alkoxysilane
Product Form	Liquid
Appearance	Colorless to pale yellow clear liquid
Molecular Formula	C₄H₁₂O₃Si
Boiling Point (at 1013 hPa)	158–160 °C
Density (at 20 °C)	0.94–0.95 g/cm³
Refractive Index (at 20 °C)	1.372–1.376
Solubility	Miscible with common organic solvents (e.g., ethanol, acetone, toluene); hydrolyzes in water

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