3M™ Fire Barrier Packing Material PM4, rockwool, firerated rockwool
3M™ Fire Barrier Packing Material PM4 Bulk is designed to be used as an alternative firerated packing material to rockwool, mineral wool, fiberglass or backer rod in through penetration gap sealing firestop systems. With excellent strength and flexibility characteristics, it is an ideal through penetration packing material. PM4 is also non-asbestos, mould resistant, and inorganic. This installation friendly material is easy to dispense and it's compact packaging is optimized for portability. The smooth textured woven material can be torn by hand, eliminating the need for a knife.
3M Fire Barrier Packing Material PM4 is approved for use in all of 3M’s listed through-penetration firestop systems. It may be used around metallic, nonmetallic, insulated pipe, HVAC and power and communication cable penetrants. In typical commercial and industrial construction, 3M Fire Barrier Packing Material can be used with gypsum and concrete assemblies. These Systems achieve up to 4 hour fire ratings when tested.
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