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

Dow DOWSIL HS Extender Silicone Rubber

Dow DOWSIL HS Extender Silicone Rubber is a high-strength liquid silicone rubber extender designed to enhance elongation and processability while maintaining thermal stability and mechanical integrity in demanding elastomer applications.
  • dow dowsil hs extender silicone rubber_1f387ee2
  • dow dowsil hs extender silicone rubber_1f387ee2

Features Of Dow DOWSIL HS Extender Silicone Rubber

  1. High-solids, low-viscosity silicone fluid designed to extend and modify high-consistency rubber (HCR) formulations.

  2. Enhances processability during mixing, calendering, and extrusion without compromising cured physical properties.

  3. Improves filler dispersion and reduces compound viscosity for better mold flow and part replication.

  4. Compatible with platinum-cure and peroxide-cure HCR systems, supporting broad formulation flexibility.

  5. Provides excellent thermal stability and long-term storage stability in compounded batches.

Typical Applications Of Dow DOWSIL HS Extender Silicone Rubber

  1. Automotive sealing systems including door, trunk, and hood gaskets.

  2. Medical device components requiring precise geometry and biocompatibility support.

  3. Consumer electronics housing seals and protective gasketing.

  4. Industrial hoses and diaphragms demanding high elasticity and compression set resistance.

  5. Appliance gaskets for refrigeration, cooking, and laundry equipment.

Specifications Of Dow DOWSIL HS Extender Silicone Rubber

Chemical TypeDimethylpolysiloxane-based silicone extender fluid
Product FormLiquid
AppearanceClear, colorless to pale yellow liquid
Primary ApplicationsExtender for high-consistency silicone rubber (HCR)
Key FeaturesLow volatility, high thermal stability, non-volatile residue
BenefitsImproved processing efficiency, enhanced filler wetting, reduced energy consumption during mixing
Storage StabilityStable for ≥12 months at 25°C in sealed containers
CompatibilityCompatible with standard HCR base polymers and common fillers (e.g., fumed silica)


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