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

Wacker SILRES 604 Silicone Resin

Wacker SILRES 604 is a solvent-based methyl-phenyl silicone resin offering excellent thermal stability, weather resistance and hardness. Part of Wacker’s SILRES® resin series, it serves as a binder or modifier in high-performance coatings, encapsulants and release agents. Compatible with organic resins, it enhances durability, gloss and chemical resistance without compromising flexibility.
  • wacker silres 604 silicone resin_4c9766e4
  • wacker silres 604 silicone resin_4c9766e4

Features Of Wacker SILRES 604 Silicone Resin

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

  2. Excellent electrical insulation properties even under humid or elevated temperature conditions.

  3. Good compatibility with organic resins and pigments, enabling hybrid formulation design.

  4. Solvent-based (xylene/toluene blend), facilitating easy integration into conventional coating and impregnation processes.

  5. Forms hard, glossy, abrasion-resistant films upon curing without requiring high-temperature post-cure.

Typical Applications Of Wacker SILRES 604 Silicone Resin

  1. Electrical insulation coatings for motor windings and transformer components.

  2. Heat-resistant varnishes for coil impregnation in industrial and automotive electric motors.

  3. Binder in high-temperature resistant paints and ceramic coatings.

  4. Matrix resin for glass fiber-reinforced composites used in exhaust system components.

  5. Surface treatment agent for improving thermal and dielectric performance of laminated insulating materials.

Specifications Of Wacker SILRES 604 Silicone Resin

Chemical TypeMethyl-phenyl silicone resin
Product FormLiquid solution
AppearanceClear, colorless to pale yellow liquid
Solvent ContentApprox. 60–65 wt.% (xylene/toluene mixture)
Non-Volatile Content35–40 wt.% at 150 °C/60 min
Viscosity (25 °C)80–120 mPa·s (Brookfield RV, spindle #3, 6 rpm)
Density (20 °C)0.92–0.95 g/cm³
Flash Point (PMCC)Approx. 35 °C


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