JVCC CFL-5A Copper Foil Tape is a 1 oz. rolled copper foil which provides excellent solderability and conformity. Used for EMI/RFI shielding of small electromagnetic components (i.e. transformer/reactor coils) and cable splices; repairing, modifying & prototype designing of wiring boards, supplementary shielding of joints/seams; and flat conductor assemblies. Annealed and non-tarnishing, bright copper color. Its aggressive acrylic adhesive system creates a superior bond. This tape is does NOT have conductive adhesive – please see JVCC CFL-5CA for a copper foil tape with conductive adhesive. Flammability: File #130121, UL 510, Section 4. Can also be used for decorative arts & crafts projects. The copper alloy is 110, which is 99.9% pure, it is also rolled and annealed not electrodeposited.