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

Wacker ELASTOSIL 4000 Silicone Rubber

Wacker ELASTOSIL® 4000 is a high-strength, platinum-cured liquid silicone rubber (LSR) offering excellent flowability, low viscosity, and outstanding thermal stability. Ideal for precision injection molding of medical devices, seals, and automotive components, it cures rapidly at elevated temperatures with minimal shrinkage and superior biocompatibility per ISO 10993.
  • wacker elastosil 4000 silicone rubber_ff8ffaed
  • wacker elastosil 4000 silicone rubber_ff8ffaed

Features Of Wacker ELASTOSIL 4000 Silicone Rubber

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

  2. Platinum-catalyzed addition curing system ensuring low shrinkage and precise dimensional stability.

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

  4. Excellent electrical insulation properties and resistance to UV, ozone, and weathering.

  5. Low compression set and superior resilience after prolonged deformation or cyclic loading.

Typical Applications Of Wacker ELASTOSIL 4000 Silicone Rubber

  1. Sealing and gasketing components in automotive powertrain and under-hood systems.

  2. Dynamic vibration-damping mounts for industrial machinery and rail equipment.

  3. Insulating parts and protective housings for high-voltage electronics and sensors.

  4. Medical device components requiring biocompatibility (ISO 10993 tested) and sterilization resistance.

  5. Custom molded parts for aerospace applications where thermal cycling and reliability are critical.

Specifications Of Wacker ELASTOSIL 4000 Silicone Rubber

Chemical TypePlatinum-catalyzed addition-cure silicone rubber
Product FormTwo-component liquid silicone rubber (LSR), Part A + Part B
AppearanceTranslucent, low-viscosity liquid (Part A); colorless to pale yellow liquid (Part B)
Shore A Hardness (7 days, 23 °C)40 ± 2
Tensile Strength (ISO 37)≥ 7.5 MPa
Elongation at Break (ISO 37)≥ 350 %
Compression Set (ISO 815, 24 h @ 150 °C)≤ 15 %
Curing SystemPt-catalyzed hydrosilylation (inhibitor-modified for processing safety)


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