Our 3M™ Fire Barrier Packing Material PM4 is designed and fully approved as an alternative packing material to mineral wool, fiberglass and backer rod in UL-listed through-penetration 3M firestop systems. Strong, flexible and non-combustible per ASTM E 136, this non-asbestos mold-resistant material is fully portable and can be installed without tools.
Fire Protection is Just the Beginning
Designed as a smooth, easy and convenient alternative to conventional firestop packing materials such as mineral wool, fiberglass and backer rod, 3M™ Fire Barrier Packing Material PM4 is much more than just another non-combustible filler. It’s smooth, strong and flexible, and its woven construction is less irritating to the skin when compared to conventional mineral wool commonly used in firestop applications. In addition, it is packaged so users can easily transport it to any job location and carry it directly to the application site. It is equally easy to dispense – installers simply pull out a length of smooth woven PM4 material from its package and tear it off by hand without the need for knives or other tools.
Fully Tested and Approved
Approved for use in all UL-listed through penetration 3M firestop systems, our 3M™ Fire Barrier Packing Material PM4 is an inorganic, non-asbestos material ideal for filling around fire protection installations. This inorganic, non-asbestos material is non-combustible per ASTM E 136 testing. It also meets the ASTM C 1338 for resistance to mold and other fungi, helping to ensure permanent firestop installation.
The Science of Better Fire Protection from 3M
Since 1925 when one of our lab assistants invented masking tape, 3M has been applying science to life –developing adhesive products and technologies that help entire industries and individual businesses worldwide. The work that began with a single 3M engineer now spans decades and generations. And all of it goes into each of our adhesives, sealants and protective coatings including 3M™ Fire Barrier Packing Material PM4 – to improve performance, and to help businesses like yours operate faster, better and more efficiently.