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Firm Silicone Foam HT-820


HT-820 is a firm grade silicone foam that offers improved durability and sealing. It is used to seal and protect various outdoor communication, lighting, and electronic enclosures from small dust particles, wind driven rain, and fire.

  • Excellent memory and low stress relaxation reduces maintenance costs associated with gasket failures due to compression set and softening
  • Resistance to ultraviolet light, ozone, extreme temperatures, and flame enables consistent performance in all environments
  • Compact cell structure provides improved sealing performance