10.13.09 | Maplewood, MN | 3M introduces 3M™ Fire Barrier Duct Wrap 615+, a new lightweight, thin-profile insulation product that provides up to two hours of fire protection for grease and air ventilation ducts. Made from an advanced ceramic fiber wrapped in scrim-enforced foil, the duct wrap is lighter and thinner than previous 3M offerings and meets the new ASTM E2336 fire test requirements. Installed around ducts, it creates a fire-resistant barrier that maintains the duct integrity and helps prevent fire from rapidly spreading throughout a building. Fire-barrier wraps are an alternative to conventional gypsum wallboard shafts and other stiffer, bulkier wrap systems.