Speedline Fire & Acoustic Sealant

The Speedline Fire & Acoustic Sealant is a four hour rated, one part emulsion acrylic based, intumescent sealant which provides a firm yet flexible seal to joints in a variety of fire rated structures.

Speedline Fire & Acoustic Sealant, in suitably designed joints, will resist the passage of fire for up to four hours. The selected fillers used in this formation also make it suitable for use as an acoustic sealant.

Standards Applied: Tested following the principles of BS EN 1366-4: 2006 as detailed in Exova report WF 168902 & WF 168903 & Acoustically tested to BS EN ISO 10140-2:2010.

Tested for air permeability to EN13141-1.


  • No priming required for most construction substrates
  • For use in joints up to 50mm wide
  • Excellent acoustic properties for sound deadening
  • Non slump – easy to apply and tool off
  • Fast cure – tack free in 15 minutes
  • Overpaintable

Areas for use

  • Sealing joints, voids and irregular holes in fire walls, partitions and other structures; also for maintaining the integrity of pipes and cables that penetrate them
  • For internal perimeter pointing of fire rated door and window frames


  • Not for use on substrates that may bleed oils, solvents or plasticisers
  • Not for use where joints are constantly immersed in water, or as part of structural glazing systems

Surface preparation

  • All surfaces must be clean, dry and dust free. All loose or flaking surface coatings, and old sealant and mastic joints, should be removed before application


Before Speedline Fire & Acoustic Sealant is used, the surfaces to be must be clean, dry and free from dust, grease and other contaminants.

Improve adhesion by wiping surface with GLASS CLEANER allowing all solvent to evaporate before applying sealant. Priming is generally not required, although we always advise testing small areas prior to use. Large voids should first be filled with FIREFOAM to maximize fire rating.

Cut the tip of the cartridge taking care not to damage the thread. Apply nozzle and cut at an angle of 45 deg with an opening slightly larger than the gap to be sealed. Apply using a standard sealant gun. Best results will be obtained by keeping an even pressure on the trigger and keeping the gun at a constant angle to the surface being sealed. To ensure a proper bond, always smooth the sealant down with a spatula or piece of wood wetted with linseed oil or white spirits. An improved joint appearance can be achieved by placing masking tape to both sides of the joint, removing within 5 minutes of application.

Single seal joints should be on the fire rated side of the structure.

Product Datasheet


Technical Information
SizeBox Quantity
310ml Tube12 Tubes
900ml Tube9 Tubes