Ideal Tape® offers a variety of Heating, Ventilation, and Air Conditioning (HVAC) foil, film, and cloth tapes that meet the industry’s toughest specifications. Our Ideal Seal® and Flex Seal® brands are used in the most demanding applications and conditions when sealing rigid fiberglass and flexible air duct systems. Our standards are high, and we have the credentials to prove it. Some of our Ideal Seal products are both UL 181A-P and UL 181B-FX Listed and our Flex Seal products are UL 181B-FX Listed. Our UL 181, mastic, flex duct, and heat seal tapes will hold up on your toughest job and are available through our distribution network at an affordable price.