UL approval aluminum foil tape Features:1) Soft aluminum foil, combined with a transparent high performance flame-retardant adhesive, which ... ) Designed for sealing joints and seams of foil jacket facings in air-conditioning ductworkSpecifications:1) Foil thickness: 18, 22, 25, 30, 36 ... -wooden caseJumbo roll: ply-wooden case Sell Flame-Retardant Aluminum Foil Tapes - UL approval