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

Wacker ELASTOSIL M 4125 Two-Component Silicone Rubber

Wacker ELASTOSIL® M 4125 is a two-component addition-curing liquid silicone rubber offering excellent flowability, low viscosity, and high tear strength. It cures rapidly at room or elevated temperatures, delivering dimensional stability, biocompatibility (ISO 10993), and outstanding replication fidelity—ideal for medical device molding, prototyping, and precision elastomer parts.
  • wacker elastosil m 4125 two component silicone rubber_a40ccb5d
  • wacker elastosil m 4125 two component silicone rubber_a40ccb5d

Features Of Wacker ELASTOSIL M 4125 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 precise 1:1 mixing ratio by weight or volume.

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

  4. Low compression set and superior resistance to aging, ozone, and UV radiation.

  5. Biocompatibility tested per ISO 10993-5 and USP Class VI, suitable for medical device prototyping.

Typical Applications Of Wacker ELASTOSIL M 4125 Two-Component Silicone Rubber

  1. Medical device components including seals, gaskets, and housings for diagnostic equipment.

  2. Prototyping and low-volume production of flexible parts in automotive sensor housings.

  3. Encapsulation and potting of electronic modules requiring thermal and electrical insulation.

  4. Food-contact compliant seals and gaskets for processing equipment (FDA-compliant upon curing).

  5. Soft-touch grips and ergonomic interfaces for consumer electronics and industrial controls.

Specifications Of Wacker ELASTOSIL M 4125 Two-Component Silicone Rubber

Chemical TypePlatinum-catalyzed addition-curing silicone rubber
Product FormTwo-component liquid system (Part A + Part B)
AppearancePart A: Translucent, viscous liquid; Part B: Translucent, viscous liquid
Mixing Ratio1:1 by weight or volume
Cure MechanismRoom-temperature vulcanization (RTV-2), no by-products
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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