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

Wacker ELASTOSIL RT 402 Two-Component Silicone Rubber

Wacker ELASTOSIL RT 402 is a two-component addition-curing silicone rubber offering excellent mechanical strength, thermal stability up to 200°C, and low compression set. Ideal for precision molding, gasketing, and encapsulation in automotive and electronics industries. Features fast demolding, high tear resistance, and outstanding dimensional stability after curing.
  • wacker elastosil rt 402 two component silicone rubber_3d97b4e9
  • wacker elastosil rt 402 two component silicone rubber_3d97b4e9

Features Of Wacker ELASTOSIL RT 402 Two-Component Silicone Rubber

  1. High tear strength and excellent elongation at break for durable, flexible molded parts.

  2. Low viscosity before curing enables easy mixing, degassing, and cavity filling—even for intricate geometries.

  3. Platinum-catalyzed addition cure system ensures precise control over pot life and fast, consistent room-temperature or elevated-temperature vulcanization.

  4. Excellent thermal stability with long-term serviceability from –60 °C to +180 °C.

  5. Meets ISO 10993-5 cytotoxicity requirements, supporting biocompatibility in non-implantable medical device applications.

Typical Applications Of Wacker ELASTOSIL RT 402 Two-Component Silicone Rubber

  1. Medical device components such as housings, seals, gaskets, and fluid-handling manifolds.

  2. Prototyping and low-volume production of functional elastomeric parts via vacuum casting and soft tooling.

  3. Industrial sealing solutions for HVAC, automotive sensors, and precision instrumentation.

  4. Consumer electronics encapsulation and protective overmolding for buttons, interfaces, and wearable components.

Specifications Of Wacker ELASTOSIL RT 402 Two-Component Silicone Rubber

Chemical TypePlatinum-catalyzed addition-cure silicone rubber
Product FormTwo-component liquid system (Part A: base; Part B: catalyst)
Appearance (Mixed)Translucent, low-viscosity liquid
Mixing Ratio (by weight)10 : 1 (A : B)
Pot Life (23 °C, 100 g batch)Approx. 30–40 minutes
Cure Time (23 °C)24 hours for full physical properties
Cure Time (100 °C)1–2 hours for full physical properties
Shore A Hardness (7 days, 23 °C)40 ± 2


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