... opening fire-rated walls, ceilings, roofs, doors and windows, and through-penetration firestops for items such as wires, ... of life by restricting the spread of fire and combustion products. One important example of passive ... sealing of through-penetrations made in rated walls and floors for vented plastic pipes. The combustible ... ABS, cc-ABS, PVDF, PP, PB, PEX and FPP. Firestop Device & Fireproof Bag