Af-20R 2 X 50 Yard Roll Aluminum Foil Tape With Liner (24 Roll/Case)

AF-20R... Insulation/HVAC

2 mil dead soft premium grade Aluminum Foil coated with an
extremely aggressive synthetic rubber adhesive that provides a
tight positive grab when smoothed down on work surfaces; removable
paper liner, total thickness 3.6 mil without liner. Used in fiberglass
duct board systems on 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 strength:
17.1 lbs/in. Elongation: 3.5%. Peel adhesion: 91 oz/in. Temperature
range: -4 F to 176 F. 3" neutral core.