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

Wacker ELASTOSIL M 4630 Silicone Rubber

Wacker ELASTOSIL® M 4630 is a platinum-catalyzed, two-component addition-curing liquid silicone rubber offering excellent flowability, low viscosity, and high tear strength. Ideal for precision casting, medical device molding, and intricate RTV applications. It delivers outstanding dimensional stability, biocompatibility (ISO 10993 compliant), and rapid cure at room or elevated temperatures.
  • wacker elastosil m 4630 silicone rubber_68a1f93e
  • wacker elastosil m 4630 silicone rubber_68a1f93e

Features Of Wacker ELASTOSIL M 4630 Silicone Rubber

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

  2. Fast room-temperature vulcanization (RTV) with low shrinkage and minimal exotherm.

  3. Excellent adhesion to common substrates including metals, plastics, and glass without primers.

  4. Outstanding resistance to aging, UV radiation, ozone, and extreme temperatures (–60 °C to +200 °C).

  5. Low viscosity before curing enables easy mixing, degassing, and precise dispensing in automated processes.

Typical Applications Of Wacker ELASTOSIL M 4630 Silicone Rubber

  1. Sealing and bonding of automotive lighting assemblies and sensor housings.

  2. Encapsulation of electronic control units (ECUs) and power modules requiring thermal stability.

  3. Manufacturing of medical device gaskets and biocompatible interface components.

  4. Industrial potting of precision sensors and IoT modules exposed to harsh environmental conditions.

  5. Assembly of HVAC system components requiring long-term elasticity and weather resistance.

Specifications Of Wacker ELASTOSIL M 4630 Silicone Rubber

Chemical TypeTwo-component addition-curing silicone rubber
Product FormPaste (Part A: base; Part B: platinum catalyst)
AppearanceOpaque, off-white to light gray paste
Base PolymerPolymethylvinylsiloxane
Curing MechanismPlatinum-catalyzed hydrosilylation
Shore A Hardness (7 days, 23 °C)45 ± 3
Tensile Strength (ISO 37)≥ 8.0 MPa
Elongation at Break (ISO 37)≥ 350 %


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