6 mil(0.15mm) Aluminum Foil Glass Fiber Cloth Tape for general HVAC ductwork maintenance, patching, seaming and sealing6 mil(0.15mm) Aluminum Foil Glass Fiber Cloth Tape for general HVAC ductwork maintenance, patching, seaming and sealing | Good flame retardant,excellent for general repairs.Good flame retardant,excellent for general repairs. | Resists flame, moisture / vapor, UV degradation, odor, weather, some chemicals and smoke transmission.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 reflectiveindoor and outdoor use. Chemically resistant, thermally conductive (helping cooling/heating efficiency), heat and light reflective | Size:6 mil(0.15mm) Thick x 2 inch (50mm) x 66 ft. If you are not satisfied, we will refund 100% of your purchase.