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

Wacker ELASTOSIL RT 604 Silicone Rubber

Wacker ELASTOSIL RT 604 is a two-component addition-cure liquid silicone rubber renowned for excellent mechanical strength thermal stability and biocompatibility ideal for medical devices and precision molding applications. It offers low viscosity easy degassing and outstanding replication fidelity with Shore A 40 hardness after curing.
  • wacker elastosil rt 604 silicone rubber_e149bdae
  • wacker elastosil rt 604 silicone rubber_e149bdae

Features Of Wacker ELASTOSIL RT 604 Silicone Rubber

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

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

  3. Outstanding resistance to aging, UV radiation, and extreme temperatures (–50 °C to +180 °C).

  4. Excellent electrical insulation properties and dielectric stability.

  5. Good adhesion to common substrates including metals, glass, and plastics without primers.

Typical Applications Of Wacker ELASTOSIL RT 604 Silicone Rubber

  1. Electrical encapsulation and potting of transformers, sensors, and power modules.

  2. Sealing and gasketing in automotive electronics and engine compartments.

  3. Protective coatings for PCBs and hybrid circuits exposed to harsh environments.

  4. Insulating layers in LED lighting assemblies and high-voltage components.

  5. Industrial prototyping and mold-making where dimensional stability and release performance are critical.

Specifications Of Wacker ELASTOSIL RT 604 Silicone Rubber

Chemical TypePlatinum-cured addition-cure silicone rubber
Product FormTwo-component liquid system (Part A: base, Part B: catalyst)
AppearanceTranslucent, viscous liquid (Part A); colorless to pale yellow liquid (Part B)
Mix Ratio (by weight)10:1 (A:B)
Curing Time (23 °C / 50% RH)Surface dry in ~30 min; full cure in 24 h
Hardness (Shore A, 7 days)60 ± 3
Tensile Strength (ISO 37)~8.5 MPa
Elongation at Break (ISO 37)~220%


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