Intumescent Mastic Sealants

Fill & seal all joints subject to the passage of fire & smoke

Unlike fire stop sealants which prevent the passage of fire and smoke by providing a tight seal around the substrates of a gap, intumescent mastic sealants swell up (or, intumesce) when exposed to heat to protect the gap or seam. Intumescent mastic sealants are formulated from various materials which includes the usal binders and fillers, with the addition of an intumescent ingredient. Usually part of a fire stopping system, intumescent mastic sealants are designed, extensively tested and suitably certified to significantly increase in volume when exposed to heat thus stopping hot ...

Fill & seal all joints subject to the passage of fire & smoke

Unlike fire stop sealants which prevent the passage of fire and smoke by providing a tight seal around the substrates of a gap, intumescent mastic sealants swell up (or, intumesce) when exposed to heat to protect the gap or seam. Intumescent mastic sealants are formulated from various materials which includes the usal binders and fillers, with the addition of an intumescent ingredient. Usually part of a fire stopping system, intumescent mastic sealants are designed, extensively tested and suitably certified to significantly increase in volume when exposed to heat thus stopping hot gases, flames and/or smoke passing through frames, partitions and other dividing structures to effectively buy more time for evacuation, (normally 4 hours).