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

Dow DOWSIL SH 850 A&B Silicone Rubber

Dow DOWSIL SH 850 A&B is a two-part addition-cure liquid silicone rubber from Dow’s DOWSIL™ portfolio offering excellent flow, low viscosity, and high tear strength for precision molding of medical, automotive, and industrial components.
  • dow dowsil sh 850 a b silicone rubber_cbd117ae
  • dow dowsil sh 850 a b silicone rubber_cbd117ae

Features Of Dow DOWSIL SH 850 A&B Silicone Rubber

  1. Two-part, platinum-cured liquid silicone rubber system offering excellent flowability and low viscosity for precise mold filling.

  2. Fast room-temperature or elevated-temperature cure with minimal shrinkage and outstanding dimensional stability.

  3. Exceptional biocompatibility compliant with ISO 10993-5 and USP Class VI testing requirements.

  4. High tear strength and elongation at break, ensuring durability in dynamic sealing and medical device applications.

  5. Low extractables and excellent resistance to steam sterilization (autoclaving), gamma irradiation, and ethylene oxide (EtO).

Typical Applications Of Dow DOWSIL SH 850 A&B Silicone Rubber

  1. Medical-grade tubing and catheters requiring long-term biostability and kink resistance.

  2. Implantable components such as soft tissue expanders and drug delivery reservoirs.

  3. Seals and gaskets for pharmaceutical processing equipment exposed to repeated sterilization cycles.

  4. Custom-molded parts for diagnostic devices and wearable health monitors.

  5. Soft-touch overmolding on thermoplastic substrates in healthcare and consumer medical devices.

Specifications Of Dow DOWSIL SH 850 A&B Silicone Rubber

Chemical TypePlatinum-cured addition-cure liquid silicone rubber
Product FormTwo-component (Part A + Part B) liquid system
Appearance (Uncured)Part A: Translucent viscous liquid; Part B: Translucent viscous liquid
Mix Ratio (A:B by weight)1:1
Cure MethodRoom temperature or heat accelerated (e.g., 100°C for 10 min)
Shore A Hardness (Cured)50 ± 3
Tensile Strength (Cured)7.0 MPa (ASTM D412)
Elongation at Break (Cured)550% (ASTM D412)


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