Fire Barrier Mortar

is a lightweight gypsum-based

and endothermic firestop that is ready for mixing with potable water. 3M™

Fire Barrier Mortar will firestop

penetrations passing through fire-rated floor or wall assemblies and other fire-rated interior building con-

struction. 3M™

Fire Barrier Mortar exhibits excellent adhesion to a full range of construction substrates and

penetrants. In addition, it will act as a heat sink, absorbing heat from penetrants and reducing the likelihood

of combustible matter igniting on the unexposed side of the assembly.

3M™

Fire Barrier Mortar is a cost-effective firestop typically used to seal mechanical and electrical service

penetrations, blank openings and other large annular spaces in fire-resistance rated wall and floor assemblies with ratings up to 3 hours. The firestop

material can be mixed to a self-leveling consistency (2 parts mortar mix: 1 part water) for floor applications or it can be mixed to a trowelable

consistency (3 parts mortar mix: 1 part water) for application to vertical and horizontal substrates.

It is a lightweight gypsum-based and endothermic firestop that is ready for mixing with potable water