2 mil dead soft premium grade Aluminum Foil coated with an extremely aggressive synthetic rubber adhesive that provides a tight positive grab when smoothead down on works surfaces; removable paper liner, total thickness 3.6 mil without liner. Used in fiberglass duct board systems n seams & joints to maintain the integrity of the vapor barrier. Can also be used on FSK systems. Malleable foil conforms well to irregular & curved surfaces. Tensile strenght: 17.8 lbs/in. Elongation: 3.5% Peel adhesion: 98 oz/in. Temperature range: -4ºF to 176ºF. 3" neutral core.
47.25" (1200mm) x 1000M (1083yd) Master Jumbo Rolls Available.
-UL Listed: UL listed tape is certified to not catch fire and burn when overheated, meanwhile non-UL listed tape will contribute or start a fire and burn like a petroleum product.

Mill:

• A "mil" is a unit of thickness equal to one thousandth of an inch. 
• To convert mil to inches take mil & divide by 1000. 
• Thus, a 2 mil bag would be .002 inches thick.
• Example: Ex: 2 mil/1000 =.002 inches