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

Wacker ELASTOSIL R 6550 Silicone Rubber

Wacker ELASTOSIL® R 6550 is a two-component addition-curing liquid silicone rubber (LSR) offering excellent flowability, low viscosity, and outstanding mechanical properties after curing. Ideal for precision injection molding of medical devices, baby care products, and technical parts requiring biocompatibility and USP Class VI compliance.
  • wacker elastosil r 6550 silicone rubber_e2f7d027
  • wacker elastosil r 6550 silicone rubber_e2f7d027

Features Of Wacker ELASTOSIL R 6550 Silicone Rubber

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

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

  3. Low compression set ensuring long-term sealing performance under sustained load.

  4. Good electrical insulation properties across wide temperature and frequency ranges.

  5. Platinum-catalyzed addition cure system enabling precise, reproducible vulcanization without by-products.

Typical Applications Of Wacker ELASTOSIL R 6550 Silicone Rubber

  1. Automotive engine compartment gaskets and vibration-damping mounts.

  2. Medical device components requiring biocompatibility and sterilization resistance.

  3. Industrial sealing systems for high-temperature fluid handling equipment.

  4. Electrical encapsulation and potting of sensors and power electronics.

  5. Custom molded parts for aerospace actuators and environmental control systems.

Specifications Of Wacker ELASTOSIL R 6550 Silicone Rubber

Chemical TypePlatinum-catalyzed addition-cure liquid silicone rubber (LSR)
Product FormTwo-component (Part A + Part B) liquid system
Appearance (Uncured)Translucent, low-viscosity liquid
Shore A Hardness (Cured)50 ± 3
Tensile Strength (Cured)8.0–10.0 MPa
Elongation at Break (Cured)≥ 350 %
Compression Set (70 °C × 22 h, ASTM D395 B)≤ 15 %
Curing SystemPt-catalyzed hydrosilylation (no peroxides or condensation by-products)


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