3M(TM) Water Soluable Wave Solder Tape 5414 Transparent, 2.1 mil (0.053 mm), poly-vinyl alcohol (PVA) backing which is water soluble and a synthetic water soluble adhesive 3M(TM) Water-Soluble Wave Solder Tape 5414, no adhesive residue after removal, low static upon liner release and when taping board, humidity extremes do not affect tpae properties, used to mask gold fingers on printed circuit boards during wave soldering.