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

Wacker ELASTOSIL M 4644 Silicone Rubber

Wacker ELASTOSIL® M 4644 is a high-consistency, platinum-cured silicone rubber offering excellent mechanical strength, thermal stability up to 180°C, and outstanding electrical insulation. Ideal for extrusion and compression molding, it complies with FDA and ISO 10993 standards, ensuring biocompatibility for medical and food-contact applications.
  • wacker elastosil m 4644 silicone rubber_594ede3a
  • wacker elastosil m 4644 silicone rubber_594ede3a

Features Of Wacker ELASTOSIL M 4644 Silicone Rubber

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

  2. Fast room-temperature vulcanization (RTV) with low viscosity for easy processing and air bubble elimination.

  3. Outstanding thermal stability, maintaining flexibility from –60 °C to +180 °C.

  4. Excellent electrical insulation properties and UL 94 V-0 flame retardancy rating.

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

Typical Applications Of Wacker ELASTOSIL M 4644 Silicone Rubber

  1. Encapsulation and potting of electronic components and power modules.

  2. Sealing and gasketing in automotive engine compartments and EV battery systems.

  3. Protective coatings for sensors, connectors, and PCBs exposed to harsh environments.

  4. Soft-touch overmolding on control panels and HMI interfaces.

  5. Industrial bonding and damping applications requiring long-term reliability.

Specifications Of Wacker ELASTOSIL M 4644 Silicone Rubber

Chemical TypePlatinum-cured addition-cure liquid silicone rubber (LSR)
Product FormTwo-component (Part A + Part B), pourable liquid
AppearanceTranslucent, low-viscosity liquid
Shore A Hardness (7 days @ 23 °C)45 ± 3
Tensile Strength (ASTM D412)8.5 MPa (min)
Elongation at Break (ASTM D412)320 % (min)
Volume Resistivity (IEC 60093)>1 × 10¹⁵ Ω·cm
UL RecognitionUL 94 V-0 (1.6 mm thickness)


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