3M aluminum foil tape 427 dissipates heat over the surface of the tape to reduce hot spots and protect the substrate from the effects of high temperatures, it is a linered version of our 3M aluminum foil tape 425, making it suitable for die-cutting applications, coated with our highly engineered acrylic adhesive, it is capable of withstanding exposure to high heat and humidity while maintaining a strong and reliable bond, this tape can withstand a variety of moisture, weathering, UV and solvents in order to provide an excellent work life, indoors or out. - 3M aluminum foil tapes 427 combine a 3 Mil nominal dead soft aluminum foil backing with a transparent acrylic adhesive. 3M aluminum foil tape 427 offers an easy-release liner. Thermally conductive tape helps dissipate heat and improves heating and cooling efficiency to protect temperature sensitive materials.