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Safire Intumescent & Acoustic Mastic

Safire Intumescent and Acoustic Mastic is a flexible, waterbased, cartridge applied acrylic intumescent sealant.

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Product Description

Safire Intumescent and Acoustic Mastic is a flexible, waterbased, cartridge applied acrylic intumescent sealant.

Air curing, it forms a non-hardening flexible seal. When exposed to fire it will swell to 4 times its original size, creating a char, preventing the passage of fire, smoke and toxic gases for up to 4 hours.