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

Wacker ELASTOSIL RT 620 Silicone Rubber

Wacker ELASTOSIL RT 620 is a two-component platinum-cured liquid silicone rubber (LSR) offering excellent mechanical strength thermal stability and biocompatibility ideal for medical devices and precision molding applications. It cures rapidly at room or elevated temperatures with low compression set and high tear resistance ensuring reliable performance in demanding industrial environments.
  • wacker elastosil rt 620 silicone rubber_6f8ebdc5
  • wacker elastosil rt 620 silicone rubber_6f8ebdc5

Features Of Wacker ELASTOSIL RT 620 Silicone Rubber

  1. Two-component, addition-cure liquid silicone rubber with excellent flowability and low viscosity for precise mold filling.

  2. Fast room-temperature curing without peroxide decomposition by-products, ensuring high purity and minimal odor.

  3. Outstanding thermal stability and long-term aging resistance from –60 °C to +180 °C.

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

  5. Good adhesion to various substrates including metals, plastics, and other silicones—no primer required in most cases.

Typical Applications Of Wacker ELASTOSIL RT 620 Silicone Rubber

  1. Encapsulation and potting of sensitive electronic components such as sensors, PCBs, and LED modules.

  2. Manufacturing of medical device housings and non-implantable elastomeric parts compliant with ISO 10993-5.

  3. Prototyping and low-volume production of flexible molds for polyurethane, epoxy, and wax casting.

  4. Sealing and gasketing in automotive under-hood applications exposed to vibration and temperature cycling.

  5. Production of soft-touch grips and ergonomic handles for industrial and consumer equipment.

Specifications Of Wacker ELASTOSIL RT 620 Silicone Rubber

Chemical TypePlatinum-catalyzed addition-cure silicone rubber
Product FormTwo-component liquid (Part A: base, Part B: catalyst)
Appearance (Part A)Translucent, colorless to pale yellow liquid
Appearance (Part B)Colorless to pale yellow liquid
Mix Ratio (A:B) by Weight10:1
Curing Time (23 °C / 50% RH)Approx. 4–6 hours to handle; full cure in 24 hours
Shore A Hardness (7 days, 23 °C)60 ± 3
Density (23 °C)1.10–1.14 g/cm³


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