Feature●Used for general purpose foil tape applications●Low flammability, UL 723 approved●Reflects light●Conducts heat●3M Preferred Converter: TapeCase is a 3M Preferred Converter; 3M has partnered with TapeCase to make their products available in a larger assortment of sizes, so that customers can use the tape in a variety of applications.Description 3M Aluminum Foil Tape 3380 is a silver 3.25 mil thick industrial grade metal foil tape suitable for general purpose foil tape applications. This product’s metal backing allows for light reflection, heat conduction, and low flammability. This tape also provides low water vapor transmission for light moisture sealing applications.