Scotch Varnished Cambric Tape 2520 is an 8-mil thick conformable tape with a non-corrosive, pressure-sensitive adhesive that is suitable for bus bar, motor leads and service drop connections. Varnished Cambric tapes are flexible, electrically insulating and moisture resistant with a smooth finish. The tape is made from straight-cut woven cotton cambric fabric that is oil primed and coated with a high-grade yellow electrical insulating varnish.