Very soft copper foil backing and a unique electrically conductive pressure-sensitive acrylic adhesive. ? Conductive acrylic adhesive ? Supplied on a removable liner for easy handling and diecutting. Copper tape is typically used for applications requiring excellent electrical conductivity from the application substrate through the adhesive to the foil backing. Common uses include grounding and EMI shielding in equipment, components, shielded rooms, etc. The copper foil backing is solderable and resists oxidation and discoloration. For Copper Tape, typical shielding effectiveness (far field) is in the range of 60dB to 80dB (30 MHz to 1 GHz). 50m per roll.