For general purpose seaming, patching and sealing. Highly Suitable for sealing off air conditioning and cool/warm air flow ducting. For sealing joints in ducting providing a flame retardant & vapor-proof barrier. Excellent adhesion on dry/clean surface on metal and other surfaces. These Foil Tapes can be applied for both high temperature/low temperatures. Sizes available from 25mm/50mm/75mm/100mm in width to customize length.