An easy-to-dispense, non-asbestos, inorganic material designed to be used as an alternative packing material to mineral wool, fiberglass and backer rod in through-penetration firestop systems. With excellent strength and flexibility characteristics it is an ideal through-penetration packing material.
Meets ASTM C 1338 Standard Test Method for Determining Fungi Resistance of Insulation Materials and Facings
Approved for use in all UL-listed through penetration 3M firestop systems
Easy to transport and carry
Convenient, hand-tear dispensing
Packing material is a part of many through-penetration firestop systems and 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 PM4 can be used in gypsum and concrete assemblies. In marine applications, 3M™ Fire Barrier Packing Material PM4 is used at bulkhead locations. In residential and non-combustible construction applications, the product can be used as a stand-alone fireblock material.