Bostik Fireban One is a fire rated intumescent, low modulus, one component, and Class A polyurethane sealant. When cured it will form a tough, flexible fire rated seal capable of cyclic expansion and compression movement of 50% (±25%) of the original installed joint width.


  • Fire rated up to 4 hours
  • Acoustic rated
  • Retains its original properties even after years of weather and UV exposure
  • Resistant to weathering conditions
  • Excellent weatherability
  • Paintable
  • Non staining


  • Interior surfaces
  • Exterior surfaces
  • Residential applications
  • Commercial applications
  • Heavy commercial applications


  • Insitu walls and floors
  • Precast panels
  • Tilt up panels
  • Brickwork
  • Blockwork
  • Rendered Masonry


  • Brick
  • Masonry
  • Concrete
  • Plasterboard (Fire rated and acoustic rated)
  • Fibre Cement Sheet (Fire rated and acoustic rated)


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