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

Dow SILASTIC 3631 Silicone Rubber

Dow SILASTIC 3631 is a high-consistency, platinum-cured silicone rubber from Dow’s SILASTIC™ series, offering excellent mechanical strength, thermal stability (–60°C to 200°C), and biocompatibility. Ideal for medical devices, seals, and precision molded parts, it cures rapidly with low compression set and superior tear resistance. Meets ISO 10993 and USP Class VI standards.
  • dow silastic 3631 silicone rubber_671e2526
  • dow silastic 3631 silicone rubber_671e2526

Features Of Dow SILASTIC 3631 Silicone Rubber

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

  2. Outstanding thermal stability across a wide operating temperature range (–60 °C to +200 °C).

  3. Good compression set resistance, maintaining seal integrity after prolonged deformation.

  4. Low volatility and low extractables—suitable for medical and food-contact applications per relevant standards.

  5. Easy processability via liquid injection molding (LIM) with balanced viscosity and pot life.

Typical Applications Of Dow SILASTIC 3631 Silicone Rubber

  1. Medical device components including tubing connectors, pump diaphragms, and wearable sensor housings.

  2. Automotive fluid handling systems such as coolant expansion tanks and turbocharger hoses.

  3. Consumer electronics enclosures and gaskets requiring reliable environmental sealing and flame retardancy.

  4. Industrial seals and O-rings exposed to ozone, UV radiation, and repeated mechanical stress.

  5. Food processing equipment parts compliant with FDA 21 CFR §177.2600 requirements.

Specifications Of Dow SILASTIC 3631 Silicone Rubber

Chemical TypePlatinum-cured liquid silicone rubber (LSR)
Product FormTwo-part liquid system (Part A + Part B)
AppearanceTranslucent to milky white viscous liquid
Primary ApplicationsSealing, gasketing, and structural bonding in regulated industries
Key FeaturesHigh consistency, low compression set, biocompatibility-ready
BenefitsReduced assembly time via LIM, improved part-to-part uniformity, long-term reliability
Curing SystemPt-catalyzed addition cure (no by-products)
Shelf Life12 months at ≤25 °C in unopened original packaging


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