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

Wacker ELASTOSIL M 4635 Silicone Rubber

Wacker ELASTOSIL® M 4635 is a platinum-cured liquid silicone rubber (LSR) offering excellent flowability, low viscosity, and outstanding mechanical properties after curing. Ideal for precision injection molding of medical devices, automotive seals, and consumer electronics due to its biocompatibility, thermal stability, and reproducible performance.
  • wacker elastosil m 4635 silicone rubber_007a752c
  • wacker elastosil m 4635 silicone rubber_007a752c

Features Of Wacker ELASTOSIL M 4635 Silicone Rubber

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

  2. Platinum-catalyzed addition cure system ensuring low shrinkage and precise dimensional stability.

  3. Excellent thermal stability with continuous service temperature range from –60 °C to +180 °C.

  4. Good electrical insulation properties and low dielectric loss across wide frequency ranges.

  5. Biocompatibility compliant with ISO 10993-5 and USP Class VI for medical-grade applications.

Typical Applications Of Wacker ELASTOSIL M 4635 Silicone Rubber

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

  2. Automotive engine bay gaskets and vibration-damping mounts requiring high heat resistance.

  3. Electrical encapsulation and potting of sensitive electronic modules and connectors.

  4. Food-contact parts such as seals and gaskets in processing equipment (compliant with FDA 21 CFR 177.2600).

  5. High-precision technical molds and soft tooling for low-volume prototyping.

Specifications Of Wacker ELASTOSIL M 4635 Silicone Rubber

Chemical TypePlatinum-cured addition silicone rubber
Product FormTwo-component liquid system (Part A: base, Part B: catalyst)
AppearanceTranslucent, low-viscosity liquid (Part A); colorless to pale yellow liquid (Part B)
Shore A Hardness (7 days, 23 °C)40 ± 2
Tensile Strength (ISO 37)8.5 MPa min
Elongation at Break (ISO 37)450 % min
Cure SystemAddition (hydrosilylation) with inhibition control
Primary ApplicationsMedical, automotive, electronics, food processing


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