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

Dow SILASTIC SH 851 U Silicone Rubber

Dow SILASTIC SH 851 U is a high-strength, heat-curable liquid silicone rubber (LSR) from Dow’s SILASTIC® portfolio. Featuring excellent flow, low viscosity, and outstanding mechanical properties after curing, it’s ideal for precision injection molding of medical, automotive, and consumer parts. Meets ISO 10993 and USP Class VI standards.
  • dow silastic sh 851 u silicone rubber_65f128fd
  • dow silastic sh 851 u silicone rubber_65f128fd

Features Of Dow SILASTIC SH 851 U Silicone Rubber

  1. High-consistency, two-part addition-cure silicone rubber with excellent processability in compression and transfer molding.

  2. Outstanding thermal stability and long-term performance across a wide temperature range (–60 °C to +200 °C).

  3. Low compression set and superior resilience for demanding dynamic sealing applications.

  4. Excellent electrical insulation properties and UL 94 V-0 rated flame resistance.

  5. Good adhesion to metals and engineered plastics without primers under optimized processing conditions.

Typical Applications Of Dow SILASTIC SH 851 U Silicone Rubber

  1. Automotive fluid-handling seals and gaskets exposed to fuels, coolants, and brake fluids.

  2. Industrial hydraulic and pneumatic system components requiring high durability and low creep.

  3. Medical device housings and non-implantable elastomeric parts compliant with ISO 10993-5 and USP Class VI.

  4. Electrical connectors and insulating housings for power distribution equipment.

  5. Consumer appliance seals for washing machines, dishwashers, and HVAC systems.

Specifications Of Dow SILASTIC SH 851 U Silicone Rubber

Chemical TypePlatinum-catalyzed addition-cure silicone rubber
Product FormTwo-part liquid (Part A: base; Part B: catalyst)
AppearanceOpaque, off-white to light tan viscous liquid (Part A); translucent amber liquid (Part B)
Primary ApplicationsStatic and dynamic seals, gaskets, diaphragms, and molded elastomeric components
Key FeaturesHigh tear strength, low compression set, excellent aging resistance
BenefitsReduced post-molding trimming, extended service life in harsh environments, consistent dimensional stability
Curing MethodHeat-cured (typically 120–170 °C for 2–10 minutes)
Shelf Life12 months at ≤25 °C in unopened original packaging


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