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

Wacker ELASTOSIL RT 772 Silicone Rubber

Wacker ELASTOSIL RT 772 is a two-component, addition-curing liquid silicone rubber (LSR) offering excellent flowability, low viscosity, and high tear strength. Ideal for precision molding of medical devices, baby care items, and technical parts, it cures rapidly at room or elevated temperatures with minimal shrinkage and outstanding biocompatibility per ISO 10993.
  • wacker elastosil rt 772 silicone rubber_3c2ce58b
  • wacker elastosil rt 772 silicone rubber_3c2ce58b

Features Of Wacker ELASTOSIL RT 772 Silicone Rubber

  1. High tear strength and excellent elongation at break for demanding dynamic applications.

  2. Fast room-temperature vulcanization (RTV) with low exotherm, enabling efficient processing without ovens.

  3. Outstanding thermal stability from –60 °C to +200 °C long-term, with short-term resistance up to +250 °C.

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

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

Typical Applications Of Wacker ELASTOSIL RT 772 Silicone Rubber

  1. Electrical encapsulation and potting of power electronics, transformers, and LED drivers.

  2. Sealing and gasketing in automotive under-hood components exposed to heat and vibration.

  3. Protective coatings for sensors and control units in industrial automation systems.

  4. Insulating layers in renewable energy equipment, including solar inverters and wind turbine controllers.

  5. Medical device housings requiring biocompatibility-compliant materials (ISO 10993 tested).

Specifications Of Wacker ELASTOSIL RT 772 Silicone Rubber

Chemical TypePlatinum-cured addition-cure silicone rubber
Product FormTwo-component liquid system (Part A: base, Part B: catalyst)
AppearanceTranslucent, low-viscosity liquid (Part A); colorless to pale yellow liquid (Part B)
Mix Ratio (by weight)10 : 1 (A:B)
Cure Time (23 °C / 50% RH)Surface dry in ~30 min; full cure in 24 h
Hardness (Shore A, cured)70 ± 3
Tensile Strength (cured)8.0 MPa (typical)
Elongation at Break (cured)220% (typical)


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