JACO FIRESTOP™ is a commercial quality, intumescent, non-combustible fire, smoke, and draft stopping sealant for through penetrations and construction voids. A water-based, non-corrosive, non-toxic, odorless compound that withstands 3000°F for 8 hours. It can be safely removed with soap and water prior to curing. Full cure occurs in several weeks depending on thickness and ambient temperatures. It adheres to most construction material including ceramics, composites, masonry, metal, plastic, and wood. Typical applications include through penetration for electrical, HVAC, plumbing, other construction voids, and around chimneys/masonry. Gaps exceeding one inch should be partially filled with mineral wool or a suitable backing. JACO FIRESTOP™ can be installed in below freezing temperature. It should not be used in continuously wet areas or dynamic expansion joints. Consult the local building code authority and the architect specifications for the proper selection and use of any fire rated product. It is available in 10.5 and 29 fluid ounce cartridges, and bulk containers.