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

Wacker ELASTOSIL RT 426 Two-Component Silicone Rubber

Wacker ELASTOSIL® RT 426 is a two-component addition-curing silicone rubber offering excellent mechanical properties thermal stability and low compression set ideal for precision molding sealing and encapsulation in automotive medical and industrial applications.
  • wacker elastosil rt 426 two component silicone rubber_21b73480
  • wacker elastosil rt 426 two component silicone rubber_21b73480

Features Of Wacker ELASTOSIL RT 426 Two-Component Silicone Rubber

  1. High tear strength and excellent elongation at break for demanding dynamic applications.

  2. Fast room-temperature curing (RTV-2) with balanced pot life and demold time.

  3. Outstanding thermal stability across a wide operating temperature range (–60 °C to +180 °C).

  4. Low compression set ensuring long-term sealing performance and resilience.

  5. Good adhesion to common substrates including metals, plastics, and glass without primer.

Typical Applications Of Wacker ELASTOSIL RT 426 Two-Component Silicone Rubber

  1. Automotive gaskets and vibration-damping components.

  2. Industrial seals and encapsulation for electronic control units (ECUs).

  3. Medical device housings requiring biocompatibility-compliant materials (ISO 10993 tested).

  4. Consumer appliance seals exposed to thermal cycling and mechanical stress.

  5. Custom molded parts for HVAC systems and fluid-handling equipment.

Specifications Of Wacker ELASTOSIL RT 426 Two-Component Silicone Rubber

Chemical TypePlatinum-catalyzed addition-cure silicone rubber
Product FormTwo-component liquid system (Part A + Part B)
AppearanceTranslucent to slightly opaque viscous liquids
Mixing Ratio (by weight)1:1 (A:B)
Cure MechanismRoom-temperature vulcanization (RTV-2)
Shore A Hardness (7 days, 23 °C)42 ± 2
Tensile Strength (ISO 37)Approx. 5.5 MPa
Elongation at Break (ISO 37)Approx. 320 %


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