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

Wacker ELASTOSIL RT 703 Silicone Rubber

Wacker ELASTOSIL RT 703 is a two-part platinum-cured liquid silicone rubber (LSR) offering excellent mechanical strength thermal stability and biocompatibility ideal for medical device molding and precision elastomer applications.
  • wacker elastosil rt 703 silicone rubber_05c2b9e3
  • wacker elastosil rt 703 silicone rubber_05c2b9e3

Features Of Wacker ELASTOSIL RT 703 Silicone Rubber

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

  2. High tear strength and exceptional elongation at break, ensuring durability in dynamic applications.

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

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

  5. Biocompatibility compliant with ISO 10993-5 and USP Class VI (when fully cured).

Typical Applications Of Wacker ELASTOSIL RT 703 Silicone Rubber

  1. Medical device components including seals, gaskets, tubing connectors, and wearable sensor housings.

  2. Automotive parts such as engine compartment seals, HVAC diaphragms, and EV battery module gaskets.

  3. Consumer electronics encapsulation for vibration-damping mounts, waterproof buttons, and flexible interface pads.

  4. Industrial automation components including precision sealing rings, membrane switches, and robotic gripper surfaces.

Specifications Of Wacker ELASTOSIL RT 703 Silicone Rubber

Chemical TypePlatinum-catalyzed addition-cure liquid silicone rubber
Product FormTwo-component (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)70 ± 2
Tensile Strength (7 days @ 23 °C)10.5 MPa (min)
Elongation at Break (7 days @ 23 °C)420% (min)
Specific Gravity (23 °C)1.15–1.18
Curing SystemRoom temperature or elevated temperature (e.g., 100 °C for 10 min)


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