Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

Wacker SILRES SY 409 Silicone Resin

Wacker SILRES SY 409 is a solvent-based methyl-phenyl silicone resin offering excellent thermal stability, weather resistance and electrical insulation. Part of Wacker’s SILRES® resin series, it cures to form hard, glossy, durable films ideal for high-performance coatings, LED encapsulation and heat-resistant finishes in demanding industrial applications.
  • wacker silres sy 409 silicone resin_32a7d22c
  • wacker silres sy 409 silicone resin_32a7d22c

Features Of Wacker SILRES SY 409 Silicone Resin

  1. High thermal stability with continuous service up to 250 °C.

  2. Excellent weather resistance and UV stability for long-term outdoor performance.

  3. Good compatibility with organic resins, enabling hybrid formulation systems.

  4. Low surface energy providing inherent water repellency and anti-soiling properties.

  5. Solvent-based liquid format for easy integration into coating and impregnation processes.

Typical Applications Of Wacker SILRES SY 409 Silicone Resin

  1. Heat-resistant coatings for industrial exhaust systems and furnace components.

  2. Weatherproofing additives in architectural silicone-modified paints and façade systems.

  3. Water-repellent impregnation agents for mineral building materials (e.g., concrete, brick, natural stone).

  4. Matrix resin in high-performance composite laminates requiring thermal and environmental durability.

  5. Binders for ceramic and refractory coatings used in metallurgical and energy applications.

Specifications Of Wacker SILRES SY 409 Silicone Resin

Chemical TypeMethyl-phenyl silicone resin
Product FormLiquid
AppearanceClear, colorless to pale yellow viscous liquid
SolventXylene / aromatic hydrocarbon blend
Solids ContentApprox. 50 wt%
Viscosity (25 °C)Approx. 1,200–1,800 mPa·s
Density (20 °C)Approx. 0.98–1.02 g/cm³
VOC ContentCompliant with EU Directive 2004/42/EC (Category C2)


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