Cupper foil to shield the electronic spaces from unwanted noise. 3M cupperfoil from the 1181 serie is designed as a shielding tape en does the job far better than the aluminum tape often found on the scratchplate of a stratocaster. The foil has a conducting glue on the tape, so you can overlap it, and the tape can be soldered without melting it.
3M 1181 serie
1 meter x 5 cm.