Marketing InformationSpray-Seal is an all-purpose, high performance sprayable duct sealant for use on all types of metal duct, duct fabric, and flex duct. Distinguished by its ability to accommodate minor vibration and movement, Spray-Seal stays flexible and will not crack. It decreases labor substantially and increases productivity while using less material. Spray-Seal also carries a 10-year warranty when used indoors and a 10-year warranty when used as part of the Foil Sealant System with AFT-701 rolled sealant.