4 mil(0.1mm) Aluminum Foil Tape for general HVAC ductwork maintenance, patching, seaming and sealing Good flame retardant,excellent for general repairs. Resists flame, moisture, vapor, UV degradation, odor, weather, some chemicals and smoke transmission. Indoor and outdoor use. Chemically resistant, thermally conductive (helping cooling/heating efficiency), heat and light reflective Size:4 mil(0.1mm) Thick x 2 inch (50.8mm) x 20m. If you are not satisfied, we will refund 100% of your purchase. Hxtape Aluminum Foil Tape is RoHS compliant, has excellent heat solvent resistance. Performs well in a wide range of temperatures and humidity. Aluminum Foil Tape has superior U.V. resistance,excellent to barrier against moisture, dust, flame and certain chemicals. The Aluminum Foil is malleable, applies easily to many surfaces. Specifications: RoHS compliant Color: Silver Material: Aluminum Foil Adhesion type: Acrylic Thickness: 4 mil(0.1mm) Adhesive power(ASTMD-1000): 1.2-1.4kg/25mm Tensile strength(ASTMD-1000): 4.2-5.2kg/mm Elongation: 10% Heat resistance: 14? to 248?(-10? to 120?). Package including: 1 x Hxtape 4 mil Thick Aluminum Foil Tape 1 inch x 66ft If you are not satisfied, we will refund 100% of your purchase.