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

Wacker ELASTOSIL A33 Silicone Rubber

Wacker ELASTOSIL A33 is a platinum-catalyzed, two-component addition-curing liquid silicone rubber offering excellent mechanical strength, thermal stability up to 200°C, and outstanding transparency. Ideal for precision molding, medical devices, and food-contact applications due to its low viscosity, long pot life, and biocompatibility per ISO 10993. Fast curing at room temperature or elevated heat ensures high productivity and dimensional accuracy.
  • wacker elastosil a33 silicone rubber_52a7e165
  • wacker elastosil a33 silicone rubber_52a7e165

Features Of Wacker ELASTOSIL A33 Silicone Rubber

  1. Platinum-catalyzed addition-cure system for precise, reproducible vulcanization.

  2. Excellent thermal stability with continuous service temperature range from –60 °C to +180 °C.

  3. Low compression set and outstanding elasticity after prolonged heat aging.

  4. High transparency and optical clarity suitable for aesthetic and functional silicone parts.

  5. Good electrical insulation properties and compliance with UL 94 V-0 flammability rating.

Typical Applications Of Wacker ELASTOSIL A33 Silicone Rubber

  1. Medical device components including seals, gaskets, and tubing connectors.

  2. Automotive sensors, ignition system parts, and under-hood sealing elements.

  3. Consumer electronics housings, button pads, and protective overmolding.

  4. Food-contact compliant seals and gaskets for processing equipment (per FDA 21 CFR §177.2600).

  5. LED encapsulation and optical lenses requiring high UV stability and clarity.

Specifications Of Wacker ELASTOSIL A33 Silicone Rubber

Chemical TypePlatinum-cured liquid silicone rubber (LSR)
Product FormTwo-component (Part A + Part B) liquid system
AppearanceClear, low-viscosity liquid (Part A); translucent liquid catalyst (Part B)
Shore A Hardness (Cured)33 ± 2
Tensile Strength (Cured)Approx. 5.5 MPa
Elongation at Break (Cured)Approx. 550%
Curing Temperature Range110 °C to 150 °C (time-dependent)
Primary ApplicationsHigh-precision molded parts requiring dimensional stability and biocompatibility


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