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

Wacker ELASTOSIL M 4642 Silicone Rubber

Wacker ELASTOSIL® M 4642 is a platinum-cured liquid silicone rubber (LSR) offering excellent flow, low viscosity, and outstanding mechanical properties after curing. Ideal for precision injection molding of medical devices, seals, and automotive components, it complies with ISO 10993 and USP Class VI standards. Fast cure kinetics and minimal post-cure requirements ensure high productivity and consistent part quality across demanding industrial applications.
  • wacker elastosil m 4642 silicone rubber_d8651de4
  • wacker elastosil m 4642 silicone rubber_d8651de4

Features Of Wacker ELASTOSIL M 4642 Silicone Rubber

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

  2. Outstanding resistance to compression set, ensuring long-term sealing performance under continuous load.

  3. Good processability in liquid injection molding (LIM) and high reproducibility in high-volume production.

  4. Excellent thermal stability across a wide service temperature range (–50 °C to +180 °C).

  5. Biocompatibility compliant with ISO 10993-5 and USP Class VI, suitable for medical-grade components.

Typical Applications Of Wacker ELASTOSIL M 4642 Silicone Rubber

  1. Medical devices including respiratory masks, tubing connectors, and drug delivery components.

  2. Automotive fluid handling systems such as coolant hoses, turbocharger seals, and EV battery gaskets.

  3. Consumer electronics enclosures and protective seals requiring vibration damping and environmental resistance.

  4. Industrial automation parts including pneumatic actuators, sensor housings, and food-grade gaskets.

Specifications Of Wacker ELASTOSIL M 4642 Silicone Rubber

Chemical TypePlatinum-cured liquid silicone rubber (LSR)
Product FormTwo-component (A+B) viscous liquid system
Appearance (Component A)Translucent, colorless to pale yellow liquid
Appearance (Component B)Translucent, colorless to pale yellow liquid
Shore A Hardness (Cured, 7 days @ 23 °C)42 ± 2
Tensile Strength (Cured, ISO 37)≈ 8.5 MPa
Elongation at Break (Cured, ISO 37)≈ 550 %
Key FeaturesLow viscosity, fast cure kinetics, low extractables, halogen-free


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