Intumescent Sleeve FlameSafe® Firestop Device Data Sheets: (MSDS, PDS, etc…)Product Data SheetFlyerFirestops Both Sides of Wall or Floor with One Installation The FlameSafe® Intumescent Sleeve (FSIS) is a firestop seal for PVC, cc-PVC, CPVC, FRPP, PP and ABS pipe and rigid nonmetallic conduit installations. Easily installed without modification, steel bolts or fasteners, the FSIS is an ideal approach for firestopping combustible pipes penetrating the uneven contours of a concrete fluted deck assembly and eliminates the need for collars or wrap strips. The FlameSafe® Intumescent Sleeve easily wraps around pipes and is manufactured from a durable 28 gauge galvanized steel outer shell that is lined with FlameSafe® FSP 1100, a highly intumescent, malleable material. It is installed with either fiberglass tape, pop rivets or stainless steel hose clamps around the pipe. When used in conjunction with the FS 900+ or FS 1900 caulk, it produces an immediate smoke seal. US Patent No. 6,207,085.