3M Aluminum Foil Tape 431 -  4"-Inch X 60yd / Silver / 3.1mil 

• Thermally conductive tape helps dissipate heat and improves heating and cooling efficiency to protect temperature sensitive materials
• Highly engineered acrylic adhesive provides long term durability, but removes cleanly after harsh masking applications
• Dead soft aluminum foil backing conforms to curved and uneven surfaces
• Withstands exposure to flame, weathering, moisture and UV