Copper Shield Tape - 6 inches wide

Block electronic noise from getting into your instrument control cavity with copper tape. This tape is 6 inches wide and sold by the foot. It usually takes about 1 foot to shield most bass control cavities and the underside of the control cover. Copper tape works much better than conductive paint.

The second photo is of a Gibson Growler Preamp installed in a copper shielded cavity by Doug of Somervell Guitars.