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

DOW DOWSIL 3-8209 Silicone Foam

DOW DOWSIL 3-8209 Silicone Foam is a fast-curing, low-density, flame-retardant silicone foam designed for gasketing, sealing, and thermal management in EV batteries and electronics. It offers excellent compression set resistance, wide temperature stability (–60°C to 200°C), and UL 94 V-0 rating. Easy to dispense and cure at room temperature or elevated heat.
  • dow dowsil 3 8209 silicone foam_3d9ce9fb
  • dow dowsil 3 8209 silicone foam_3d9ce9fb

Features Of DOW DOWSIL 3-8209 Silicone Foam

  1. Soft, compressible silicone foam with excellent resilience and long-term compression set resistance.

  2. Broad operating temperature range from –65 °C to +200 °C for reliable performance in extreme environments.

  3. Naturally flame-retardant (UL 94 HF-1 rated) without halogenated additives.

  4. Low outgassing and low ionic content — suitable for aerospace, medical, and high-purity electronics applications.

  5. Easily die-cut, kiss-cut, or waterjet-cut; compatible with standard gasketing and assembly processes.

Typical Applications Of DOW DOWSIL 3-8209 Silicone Foam

  1. Aerospace cabin sealing and thermal/acoustic insulation gaskets.

  2. Medical device enclosures requiring biocompatibility and sterilization resistance.

  3. EV battery module cushioning and fire barrier padding.

  4. High-reliability electronics housings for EMI/RFI shielding interface seals.

  5. LED lighting fixtures demanding long-life light-tight and environmental seals.

Specifications Of DOW DOWSIL 3-8209 Silicone Foam

Chemical TypePlatinum-cured silicone elastomer foam
Product FormDie-cut sheets, rolls, or custom gaskets (standard thicknesses: 1.5–10 mm)
AppearanceUniform beige, closed-cell foam with smooth skin surfaces
Primary ApplicationsSealing, cushioning, thermal management, and fire barrier solutions
Key FeaturesFlame retardant (UL 94 HF-1), low compression set, wide temperature stability
BenefitsReduced assembly force, long-term seal integrity, halogen-free formulation
ComplianceMeets ASTM D1056, UL 94, and ISO 10993-5 (cytotoxicity tested)


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