This fire rated acoustic sealant is a very high quality, high flexibility, silicone based sealant, which provides excellent acoustic properties due to its high movement capacity and elastic recovery. It is assessed to BS476: Part 20 giving up to 4 hours of fire resistance in suitable structures. It cures to form a tough, tack-free seal with excellent adhesion to a wide variety of building surfaces including plaster and wood.
To seal gaps in acoustic structures it is essential that the sealant used does not dry to a hard finish. The sealant must be flexible enough to provide a good seal as well as accommodate joist movement which is likely to occur over time. Failure to use a suitable sealant will seriously compromise the performance. Many sealants simply do not provide enough elasticity for acoustic purposes, especially intumescent versions which expand with heat.
Tested to BS476: Part 20
NBN 713.020 - EN 1366-4
Preparation: Surfaces must be sound, clean, dry and free from dust, oil, grease and other loose materials.
Joint size: Min. 5mm / Max. 30mm
High performance: Up to four hour fire rating in certain joint configurations
Elongation at break: 900% (DIN52455)
Coverage: Approx. 11 linear metres of a 6mm bead
Temperature resistance: -40c to +140C
Internal or external use
Main uses: For joints in compartment walls and floors, expansion joints, seals around lightweight partitioning, around fire rated doors and in service penetrations where the integrity of a fire wall needs to be maintained.
Size: 310ml cartridge