XFasten Professional Aluminum Foil Tape, 3.6 mil, 2 Inches x 55 Yards HVAC Tape Industrial-grade Aluminum Reflective Foil Tape equipped with high-heat capacity epoxy resin and quick-release silicone adhesive liner. Withstands extreme humidity and temperature from -30C to 180C. This Metallic Furnace Duct Tape for HVAC is ideal for sealing hot and chilly air ducts, repairing metal seams and insulating aluminum duct pipes. Increases temperature efficiency, making this dryer foil tape ideal for insulation, heat sinks, AC-units, heaters and vents. Heavy-duty performance against flame, moisture, weather, corrosion and rusting. This adhesive aluminum tape provides excellent bond on metals, plastics, copper, ceramic and concrete. Conformable and pressure sensitive adhesive enables it to fit on corrugated joints and irregular corners. Excellent flame retardant and vapor barrier. Can be stored at any environment without degrading, making this aluminum duct tape ideal for window type AC and heaters, vents and ducting.