Product Description FS-One is an intumescent firestop sealant designed to expand when exposed to fire. It helps protect combustible and non-combustible penetrations. Providing up to a 4 hour fire rating. Applications Durable fire sealant for insulated metal pipes, non-insulated metal pipes, with or without sleeve, jacketed cables, cable bundles, plastic pipes, and top of wall joints. Examples Sealing around plastic pipe penetrations in fire rated construction. Storage Requirements Store only in original package in a cool, dry place in a temperature between 5°C and 30°C. Respect the expiration date on the package. Technical Data Chemical composition: Water-based intumescent acrylic dispersion. Density: Approx. 1.5 g/cm3 Approvals/Listings UL Classified UL 1479 Factory Mutual FM Approved ICBO Evaluation Service Inc. Report No. 5071 California State Fire Marshall Listing No. 1200:108 City of New York MEA 326-96-M City of Los Angeles Research Report 25188 CUL Classification