The tape consisting a copper foil backing coated with acrylic pressure sensitive adhesive.copper tape has a conductive acrylic adhesive for grounding and RFI/EMI (radio-frequency interference/electromagnetic interference) shielding applications. Also known as EMI shielding tape, it provides a very low rate of electrical resistance for good conductivity. The tape is solder able, resists oxidation and discoloring, and withstands temperatures up to 120 degrees . It has a peel-off liner, which protects the adhesive from exposure to air until ready for use.