Aluminum foil tape is suitable for all kinds of transformers, mobile phones, computers, PDAs, PDPs, LED displays, notebook computers, copiers and other electronic products where electromagnetic shielding is required. Strong adhesion, good electrical conductivity, can be easily wound and attached to the wire. SIZE: 3 Inch(72mm) by 40 Feet, 4mil The silver aluminum tape is composed of a foil and a special adhesive layer with a protective release liner. We use water resistant non acrylic glue., unlike conventional tape. Withstands extreme temperature from -20°C to 180°C. Good for both indoor and outdoor use. Resists flame, thermally conductive, moisture, weather, some chemicals and smoke transmission, corrosion and rusty resistant.