Historical: Intumescent Firestop Sealant - 2015
This information reflects our best understanding of product composition in 2015.
Intumescent firestop sealants are used to seal joints and voids in fire-rated assemblies, including around through penetrations such as pipes, HVAC ducting, cables, etc. The sealant offers good adhesion to a variety of surfaces including metal,...
Intumescent firestop sealants are used to seal joints and voids in fire-rated assemblies, including around through penetrations such as pipes, HVAC ducting, cables, etc. The sealant offers good adhesion to a variety of surfaces including metal, plastic, drywall, concrete, and wood. The sealant contains fire resistant and intumescent materials to prevent the spread of fire and smoke through the protected joints and penetrations. The most common material is water-based with an elastomeric acrylic polymer binder. The material is supplied in tubes or pails for application with a caulk gun, trowel or putty knife. While the primary purpose of these sealants is fire protection, they do also decrease sound transmission through the sealed voids.
A more up to date Common Product is available here: https://pharos.habitablefuture.org/common-products/2085504.