Duct and Insulation Tapes 600 Series   –  General purpose grade, dead soft aluminum foil   –  General purpose grade; 2 mil, dead soft aluminum foil; clear acrylic, aggressive adhesive; removable liner. For use in non-critical applications such as sealing out dust and moisture, masking and duct sealing; provides service from 0 degrees F to 150 degrees F; very conformable.   –  Carolina Tape   –