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

Wacker ELASTOSIL RT 703 Two-Component Silicone Rubber

Wacker ELASTOSIL RT 703 is a two-component addition-curing silicone rubber offering excellent mechanical strength thermal stability and low compression set. It cures rapidly at room temperature with precise 1:1 mixing ratio ideal for precision molding encapsulation and prototyping in medical automotive and electronics industries.
  • wacker elastosil rt 703 two component silicone rubber_515ea257
  • wacker elastosil rt 703 two component silicone rubber_515ea257

Features Of Wacker ELASTOSIL RT 703 Two-Component Silicone Rubber

  1. High tear strength and excellent elongation at break for durable, flexible molded parts.

  2. Low viscosity before curing enables easy mixing, degassing, and cavity filling—even for intricate geometries.

  3. Platinum-catalyzed addition cure system ensures precise control over pot life and fast, consistent room-temperature or elevated-temperature curing.

  4. Exceptional biocompatibility and compliance with ISO 10993-5 (cytotoxicity) and USP Class VI standards.

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

Typical Applications Of Wacker ELASTOSIL RT 703 Two-Component Silicone Rubber

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

  2. Prototyping and low-volume production of functional elastomeric parts in R&D and engineering labs.

  3. Encapsulation and potting of sensitive electronic assemblies requiring thermal stability and electrical insulation.

  4. Food-contact compliant molds and gaskets for processing equipment in beverage and dairy industries.

  5. Soft-touch overmolding on plastic or metal substrates for consumer electronics and automotive interiors.

Specifications Of Wacker ELASTOSIL RT 703 Two-Component Silicone Rubber

Chemical TypePlatinum-catalyzed addition-cure silicone rubber
Product FormTwo-component liquid system (Part A + Part B)
AppearanceTransparent, low-viscosity liquids (Part A: colorless; Part B: pale yellow)
Mixing Ratio (A:B)1:1 by weight
Shore A Hardness (cured, 7 days @ 23 °C)30 ± 2
Tensile Strength (cured, 7 days @ 23 °C)5.0–6.5 MPa
Elongation at Break (cured, 7 days @ 23 °C)≥ 450 %
Primary ApplicationsMedical devices, prototyping, electronics encapsulation, food-grade sealing


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