Berry Plastics Nashua professional grade metallized duct tape used to match and close aluminum, steel and other types of metal. Easy to apply - no liner. Extremely conformable. Very aggressive adhesive. Backing matches metal surfaces. Applications includes seals flexible duct work and foil covered sheathing. Used to match and close aluminum, steel and other types of metal. Ideal for use on reflective insulation. Maintenance applications in manufacturing environments. General repair. Bundling, patching, and mending. Duct sealing and HVAC contractor uses. Metallized PE-coated cloth backing. Excellent balance of tensile strength and tearability. Natural rubber based adhesive. Aggressive adhesion to rough surfaces. Superior holding power for hanging applications. Low VOC content. Can contribute toward satisfying EQ Credit 4.1 (Low Emitting Materials) under LEED. d in accordance with UL 723. Total thickness: 11 mils. Adhesion to steel: 70 ounces per inch. Adhesion to backing: 39 ounces per inch. Tensile strength: 24 pounds per inch. Elongation: 24 percent. Operating temperature: 40 to 200 degree F. Smoke developed: 5. Flame spread: 10. VOC content: less than 1 grams per liter.