About HB Fuller

Informations about our construction products and our philosophy

FIRESOUND™ Original is a fire rated acoustic sealant.

FIRESOUND™ is formulated primarily to perform as a barrier to the incursion of fire through expansion joints and wall penetrations such as pipes or cables. FIRESOUND™ is also an effective acoustic sealant.

Key Benefits

  • Fire rating for gaps up to 50mm
  • Up to 4 hour fire rating (AS1530.4-2005)
  • Excellent acoustic properties (STC 65)
  • Good flexibility; +/- 20% joint movement capability
  • Paintable
  • Intumescent; expands when exposed to fire or extreme heat

Consult a fire engineer before use in a fire rated application.

  • Sealing exterior and interior construction joints that are subject to movement (up to +/-20%) in pre-cast concrete panels, block work and brickwork
  • Gaps around cables, metal pipes, conduits, busways and ducts that penetrate walls, floors and ceilings
  • If joint movement is not required, Firesound can be used as a putty for filling holes in fire rated substrates
  • Concrete
  • Aerated Concrete
  • Mortar
  • Masonry
  • Plasterboard
  • Steel
  • Aluminium
  • Cable Coverings (PVC)

Due to variations in fire & acoustic rating results using different thickness & types of substrates advice should be sought concerning the suitability of Firesound™ in specific applications. For external use, Firesound™ sealant must be protected from rain or water, until such time as the sealant builds up a thick skin to avoid washout. Therefore do not apply sealant when rain exposure is likely, or before a thick skin can develop. This is typically 24 hours in summer (25 to 30°C), but will be significantly longer in winter, or times of high humidity. Not suitable for use in water retaining structures or where water pooling may occur. Do not apply on wet substrates.