Specified Technologies Firestop Putty, SSP, 36 Cubic In. Tube

SSB Intumescent fire stop putty non-hardening putty pads are easily applied with no mess or excessive residue. SpecSeal Series174 SSP putty is a non-hardening, intumescent compound designed to seal through penetrations as well as certain membrane penetrations against the spread of fire, smoke and toxic gasses.