STI SpecSeal SSP Firestop Putty Pad, 9" x 9", SSP9S

SpecSeal® SSP Putty is a non-hardening, intumescent compound designed to seal through-penetrations as well as certain membrane penetrations (med-gas valve box, tub & shower valve, clean-out tee) against the spread of fire, smoke, and hot gasses. SpecSeal® Putty expands up to eight times its original size when exposed to high temperatures or flames.

• Density: 1.45 kg/L (12.08 lb/gal)