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

Wacker ELASTOSIL M 4541 Silicone Rubber

Wacker ELASTOSIL® M 4541 is a platinum-catalyzed, two-component addition-curing liquid silicone rubber offering excellent mechanical strength, low viscosity, and outstanding thermal stability. Ideal for precision molding, encapsulation, and medical device fabrication, it complies with ISO 10993 and USP Class VI standards. Fast curing, minimal shrinkage, and biocompatibility make it a top choice in demanding industrial and healthcare applications.
  • wacker elastosil m 4541 silicone rubber_8db5af45
  • wacker elastosil m 4541 silicone rubber_8db5af45

Features Of Wacker ELASTOSIL M 4541 Silicone Rubber

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

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

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

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

  5. Low viscosity paste formulation enabling easy mixing, degassing, and precise mold filling.

Typical Applications Of Wacker ELASTOSIL M 4541 Silicone Rubber

  1. Automotive gaskets and vibration-damping components.

  2. Electrical insulation housings and potting compounds for power electronics.

  3. Medical device seals and enclosures compliant with ISO 10993 biocompatibility requirements.

  4. Industrial sealing profiles for HVAC, lighting, and outdoor equipment.

  5. Prototyping and small-batch production of precision silicone parts via manual or semi-automatic casting.

Specifications Of Wacker ELASTOSIL M 4541 Silicone Rubber

Chemical TypeCondensation-curing, two-component addition-cure silicone rubber
Product FormPaste (Part A) and liquid catalyst (Part B)
AppearanceOff-white to light beige paste (Part A); colorless to pale yellow liquid (Part B)
Shore A Hardness (7 days, 23 °C)45 ± 3
Tensile Strength (7 days, 23 °C)≥ 5.0 MPa
Elongation at Break (7 days, 23 °C)≥ 250 %
Cure Time (Surface Dry)~30 minutes at 23 °C / 50 % RH
Operating Temperature Range–60 °C to +200 °C (continuous)


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