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BOSS® 813+ Fire Retardent Foam is a one-component, self-expanding, ready to use PU-foam, which contains HCFC and CFC-free propellants which are not harmful to the ozone layer. The product also has fire-retardant characteristics, according to the European standard EN 1366-4. It has high acoustic insulation properties, in addition to its thermal insulation characteristics.


  • Excellent bonding properties.
  • Fire-resistant in a joint (EN 1366-4).
  • Good adhesion on all surfaces (except PE, PP, and PTFE).
  • High filling capacity.
  • High insulation value – thermal and acoustic.


  • All foam applications in static joints.
  • Applying acoustic baffles.
  • Installation of fireproof doors and windows.
  • Sealing of all openings in roof constructions.
  • Sealing of fire-retardant joints in walls, ceilings, penetration seals, and joints.


This product is available in pink.


Available in a 750 ml aerosol can.

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