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

Wacker ELASTOSIL M 4503 Two-Component Silicone Rubber

Wacker ELASTOSIL® M 4503 is a two-component addition-curing silicone rubber offering excellent mechanical strength, thermal stability (–60°C to +200°C), and low compression set. Ideal for precision molding of seals, gaskets, and medical components, it cures rapidly at room temperature with outstanding dimensional accuracy and biocompatibility per ISO 10993.
  • wacker elastosil m 4503 two component silicone rubber_22be4ce1
  • wacker elastosil m 4503 two component silicone rubber_22be4ce1

Features Of Wacker ELASTOSIL M 4503 Two-Component Silicone Rubber

  1. High tear strength and excellent elongation at break for demanding mechanical performance.

  2. Fast room-temperature curing (RTV-2) with low mixed viscosity for easy processing and air bubble release.

  3. Outstanding thermal stability and long-term resistance to aging, UV, and ozone exposure.

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

  5. Low compression set and high resilience for reliable sealing and dynamic gasket applications.

Typical Applications Of Wacker ELASTOSIL M 4503 Two-Component Silicone Rubber

  1. Industrial sealing and gasketing for automotive and machinery components.

  2. Prototyping and functional model making in rapid manufacturing environments.

  3. Encapsulation of sensitive electronic modules requiring electrical insulation and thermal management.

  4. Medical device housings and non-implantable components compliant with ISO 10993-5 cytotoxicity testing.

  5. Vibration-damping mounts and shock-absorbing elements in precision equipment.

Specifications Of Wacker ELASTOSIL M 4503 Two-Component Silicone Rubber

Chemical TypePlatinum-cured addition-cure silicone rubber
Product FormTwo-component liquid system (Part A + Part B)
Appearance (Mixed)Translucent, viscous liquid
Shore A Hardness (7 days, 23°C)45 ± 2
Tensile Strength (7 days, 23°C)6.5 MPa (min)
Elongation at Break (7 days, 23°C)320% (min)
Curing Time (Surface Dry)~30 minutes at 23°C / 50% RH
Operating Temperature Range−60°C to +180°C (continuous)


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