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

Dow SILASTIC RTV-3133 Silicone Rubber

Dow SILASTIC RTV-3133 Silicone Rubber is a two-part, platinum-catalyzed, addition-cure liquid silicone rubber offering excellent flow, low viscosity, and high tear strength. Ideal for precision molding of medical devices, seals, and gaskets, it cures rapidly at room or elevated temperatures with minimal shrinkage and outstanding biocompatibility per ISO 10993.
  • dow silastic rtv 3133 silicone rubber_28685a0a
  • dow silastic rtv 3133 silicone rubber_28685a0a

Features Of Dow SILASTIC RTV-3133 Silicone Rubber

  1. Fast room-temperature vulcanization (RTV) with low viscosity for excellent flow and air-release.

  2. Excellent adhesion to common substrates including metals, plastics, and glass without primer.

  3. Outstanding thermal stability across a wide service temperature range from –55 °C to +200 °C.

  4. Good electrical insulation properties and low dielectric loss at high frequencies.

  5. UL 94 HB rated flame retardancy and RoHS-compliant formulation.

Typical Applications Of Dow SILASTIC RTV-3133 Silicone Rubber

  1. Encapsulation and potting of electronic components and power modules.

  2. Sealing and bonding in automotive sensor assemblies and under-hood electronics.

  3. Insulating coatings for LED lighting housings and driver modules.

  4. Gap-filling and thermal interface material (TIM) alternatives in compact power electronics.

  5. Protective conformal coating for printed circuit boards (PCBs) in industrial controls.

Specifications Of Dow SILASTIC RTV-3133 Silicone Rubber

Chemical TypePlatinum-cured addition-cure silicone rubber
Product FormTwo-component liquid system (Part A + Part B)
AppearanceTranslucent, low-viscosity liquid (Part A); colorless to pale yellow liquid (Part B)
Mix Ratio by Weight10:1 (Part A : Part B)
Cure MechanismRoom-temperature vulcanization (RTV), heat-accelerated cure optional
Shore A Hardness (7 days, 23 °C)33–37
Tensile Strength (ASTM D412)5.0–6.5 MPa
Primary ApplicationsElectronics encapsulation, sealing, and thermal management


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