Scotch Foil Tape 3326 is especially designed for use on UL listed flexible and rigid air ducts. Its specially formulated acrylic adhesive bonds quickly and holds even at -25oF. Its soft aluminum handles and applies easily but still provides strength for UL 181A and ULB-FX compliance. The printed backing provides code compliance verification for building inspectors.Soft aluminum applies easilyCan be used under all weather conditionsResists water vapor, odor and smoke transmissionAdhesive is protected until the liner is removedFor UL 181A and ULB-FX compliantPrinted backing provides code compliance verification for building inspectorsColor: silverContains: 1-roll/packSize: 2.5 in. x 60 yd.