3M™ Aluminium Foil Tape 425 is a 2.8-mil dead-soft aluminium foil backing combined with a special transparent synthetic acrylic adhesive that makes this the best general purpose foil product available. This tape has excellent heat and light reflection to protect against high temperatures and UV degradation. Conformable tape resists flame, moisture, weather, UV degradation and many chemicals. Thermally conductive tape helps heating and cooling efficiency. Heat and light reflective tape protects, insulates and enhances lighting efficiency. The special acrylic adhesive supplies superior temperature, UV and solvent resistance to produce a strong, lasting and reliable bond. It provides excellent age life and is ideal for harsh, long-term indoor and outdoor environments. Meets UL 746C (File E 122798) and 723, Class 'L' for low flammability rating (File R 7311). Temperature use range is from -65° to 300°F (-54° to 149°C).