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

Wacker ELASTOSIL M 4440 Two-Component Silicone Rubber

Wacker ELASTOSIL® M 4440 is a two-component addition-curing silicone rubber offering excellent mechanical strength, thermal stability up to 200°C, and outstanding replication fidelity for precision molds. It features low viscosity, long pot life, and rapid room-temperature or elevated-temperature curing—ideal for industrial prototyping, soft tooling, and medical device manufacturing.
  • wacker elastosil m 4440 two component silicone rubber_ef0c69f2
  • wacker elastosil m 4440 two component silicone rubber_ef0c69f2

Features Of Wacker ELASTOSIL M 4440 Two-Component Silicone Rubber

  1. Excellent mechanical properties including high tear strength and elongation at break.

  2. Fast room-temperature vulcanization (RTV) with balanced pot life and cure speed.

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

  4. Outstanding thermal stability and resistance to aging under ambient and elevated temperatures.

  5. Low viscosity components ensure easy mixing, degassing, and mold filling for complex geometries.

Typical Applications Of Wacker ELASTOSIL M 4440 Two-Component Silicone Rubber

  1. Manufacturing of precision silicone rubber parts for medical devices and components.

  2. Production of seals, gaskets, and vibration-damping elements in automotive systems.

  3. Prototyping and low-volume production of functional elastomeric parts via casting or injection molding.

  4. Encapsulation and potting of sensitive electronic assemblies requiring electrical insulation and thermal resilience.

  5. Tooling and mold-making for polyurethane, epoxy, and other resin-based casting applications.

Specifications Of Wacker ELASTOSIL M 4440 Two-Component Silicone Rubber

Chemical TypePlatinum-cured addition-cure silicone rubber
Product FormTwo-component liquid system (Part A + Part B)
AppearanceTranslucent, low-viscosity liquids
Mixing Ratio (by weight)1:1 (A:B)
Cure MechanismRoom-temperature vulcanization (RTV), platinum-catalyzed
Shore A Hardness (7 days, 23°C)40 ± 2
Tensile Strength (ISO 37)8.5 MPa (typical)
Elongation at Break (ISO 37)450 % (typical)


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