STI Firestop Mortar Bag (22 Lbs./10 Kilos), SSM22B

SpecSeal SSM Firestop Mortar is a light-weight cost conscious solution for oversized openings in concrete walls and floors. Once mixed with water, SpecSeal Mortar forms a light weight, low density slurry that easily applies into concrete walls and floors. SpecSeal Mortar cures quickly and will not spall or crack due to freezing or changes in temperature.