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

Wacker ELASTOSIL M 4125 Silicone Rubber

Wacker ELASTOSIL® M 4125 is a platinum-cured liquid silicone rubber (LSR) offering excellent flow, low viscosity, and high tear strength. Ideal for injection molding of medical devices, baby care items, and precision technical parts. Features biocompatibility per ISO 10993, thermal stability, and consistent reproducibility across production cycles.
  • wacker elastosil m 4125 silicone rubber_011e4c84
  • wacker elastosil m 4125 silicone rubber_011e4c84

Features Of Wacker ELASTOSIL M 4125 Silicone Rubber

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

  2. Platinum-catalyzed addition curing system ensures low compression set and consistent performance.

  3. Excellent thermal stability across a wide service temperature range (–60 °C to +180 °C).

  4. Good electrical insulation properties and low dielectric loss at high frequencies.

  5. Biocompatibility compliant with ISO 10993-5 and USP Class VI (when fully cured).

Typical Applications Of Wacker ELASTOSIL M 4125 Silicone Rubber

  1. Medical device components including tubing, seals, and wearable sensor housings.

  2. Automotive sealing systems for engine compartments and EV battery module gaskets.

  3. Industrial automation parts such as vibration-damping mounts and precision sealing rings.

  4. Consumer electronics enclosures requiring EMI shielding compatibility and tactile feedback.

  5. Aerospace-grade seals and bushings where long-term reliability under thermal cycling is critical.

Specifications Of Wacker ELASTOSIL M 4125 Silicone Rubber

Chemical TypePlatinum-cured addition silicone rubber
Product FormTwo-component liquid (Part A + Part B)
AppearanceTranslucent, viscous liquid (Part A); translucent, low-viscosity liquid (Part B)
Shore A Hardness (7 days, 23 °C)40 ± 2
Tensile Strength (ASTM D412)≥ 7.0 MPa
Elongation at Break (ASTM D412)≥ 450 %
Density (ISO 1183)1.12–1.16 g/cm³
Curing SystemPt-catalyzed hydrosilylation (inhibitor-modulated)


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