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

Wacker ELASTOSIL E4 Silicone Rubber

Wacker ELASTOSIL E4 is a platinum-cured liquid silicone rubber (LSR) offering excellent flow, low viscosity, and high tear strength. Ideal for precision injection molding of medical devices, baby care items, and automotive seals. Features biocompatibility per ISO 10993, thermal stability up to 200°C, and consistent vulcanization. Trusted for reproducible part quality and regulatory compliance across global markets.
  • wacker elastosil e4 silicone rubber_7bb4f846
  • wacker elastosil e4 silicone rubber_7bb4f846

Features Of Wacker ELASTOSIL E4 Silicone Rubber

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

  2. Fast room-temperature vulcanization (RTV) with low shrinkage and minimal by-products.

  3. Outstanding resistance to aging, UV radiation, and extreme temperatures (–60 °C to +200 °C).

  4. Good electrical insulation properties and low compression set over extended service life.

  5. Biocompatibility compliant with ISO 10993-5 and USP Class VI for medical-grade use.

Typical Applications Of Wacker ELASTOSIL E4 Silicone Rubber

  1. Medical device components including seals, gaskets, and wearable sensor housings.

  2. Automotive lighting lenses and protective encapsulants for LED modules.

  3. Industrial sealing systems for HVAC, pumps, and fluid-handling equipment.

  4. Consumer electronics enclosures requiring environmental protection and tactile feedback.

  5. Food-contact approved parts such as dispensing valves and processing equipment gaskets.

Specifications Of Wacker ELASTOSIL E4 Silicone Rubber

Chemical TypePlatinum-catalyzed addition-cure liquid silicone rubber (LSR)
Product FormTwo-component liquid system (Part A + Part B)
AppearanceTranslucent, low-viscosity liquid (Part A); translucent liquid catalyst (Part B)
Shore A Hardness (7 days, 23 °C)40 ± 3
Tensile Strength (ISO 37)8.5 MPa (typical)
Elongation at Break (ISO 37)550% (typical)
Curing Time (23 °C, 50% RH)Surface tack-free in ~30 minutes; full cure in 24–48 hours
Primary ApplicationsSealing, encapsulation, molding, and biomedical components


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