FS-1000 is a commercial quality, intumescent, non-combustible fire, smoke, and draft stopping sealant for penetrations and construction voids. A water-based, non-corrosive, non-toxic, odorless compound that withstands 3000º F for 8 hours. FS-1000 can be safely removed with soap and water prior to curing. Unopened containers are not affected by freeze/thaw cycles or seasonal storage up to 160° F and have an expected shelf life of one year. FS-1000 adheres to most construction materials including ceramics, composites, masonry, metal, plastic, and wood. Paintable and sandable.