Xtreme Fire Seal

Bostik Xtreme Fire Seal, Fire Retardant High Performance MS Sealant

Fire Retardant High Performance MS Sealant

Bostik Xtreme Fire Seal is a high performance and durable single component fire retardant sealant based on MSP (Modified Silyl-Polymer) technology. Xtreme Fire Seal absorbs movements up to 25% and cures with the aid of atmospheric humidity to form a durable elastic rubber.

Suitable Materials

  • Aluminium (Ref: Blue Scope)
  • Metal
  • Glass
  • Concrete
  • Copper

Recommended Uses

  • Sealing expansion joints in construction which require fire resistance in floors, ceilings and walls.
  • Sealing external penetrations around services and internal penetrations for services between floors, etc


  • 290ml
  • 600ml


  • White
  • Up to 4 hours fire resistance - tested in accordance with AS 1530.4-2014
  • Water potable - Tested in accordance with AS 4020
  • Also suitable for wall/ceiling and wall/floor joints
  • Applicable for joints up to 30mm wide
  • Prevents unwanted airflows
  • Excellent processing and easy toolability
  • Accommodates joint movement up to 25%
  • Paintable with most water and oil based paints
  • Resists fungus and vermin
  • Not corrosive towards metals
  • UV, weather and water resistant
  • Durable and odourless

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