STI SpecSeal SSS Firestop Sealant is a premium grade water-based intumescent firestop sealant. This sealant incorporates a 2-stage intumescent technology for combustible or noncombustible penetrants. As little as 1/2 in. applied depth of sealant is required to provide up to a 4 hr. Fire resistance rating when tested to ASTM E814/UL 1479. 2-Stage intumescent technology Easily works into tight spaces between penetrants Compatible with CPVC Piping Can be sanded and painted to match its surroundings Used in more than 500 through-penetration UL Tested Systems This listing is for each. Fire Rating : Up to 4 hr Item : Fire Barrier Sealant Container Type : Cartridge Material : Intumescent Application Method : Caulk Gun Color : Red Firestop Application : Cable Trays, Cables, Ducts, Metal Pipe, Plastic Pipe Firestop Item : Firestop Sealant Size : 29 oz Standards : FM Approved, UL Classified Country of Origin (subject to change) : United States