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3M 4" x 20'-6" Fire Barrier Pack Material

Brand: 3M Mfg#: 98040055299
Product#: 479PM4BULK
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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


  • Convenient, hand tear dispensing
  • Non combustible material
  • Easy to transport and carry
  • Approved for use in all UL listed through penetration 3M firestop systems
  • Less irritating to skin
  • Meets ASTM C 1338 standard test method for determining fungi resistance of insulation materials and facings


  • Brand: 3M
  • Color: Off White
  • Material: Non-Asbestos
  • Length: 20.5 ft
  • Width: 4 in
  • Special Features: ASTM C 1338
  • Usage: For an Alternative Packing Material to Mineral Wool, Fiberglass and Backer Rod in through-Penetration Firestop Systems