Water Soluble Paper and Tape, 2 in W x 300 ft L, Tape, White no checkout harnesses and flush cuts soft harnesses and flush cuts soft wire up to 14AWG and equipment widely used in HVAC applications Bonds to aluminum and many other metals Fills porosity in aluminum castings Can be machined drilled or tapped using conventional metalworking tools Qualifies under Mil Spec MIL PRF 24176C Provides a convenient and cost effective method for creating purge chambers for pipe welding Low air permeable purge gas barrier for TIG welding Excellent barrier for retaining noble gas (argon and argon helium mix) Simple and fast construction Dissolves effortlessly and rapidly during water or steam hydro test leaving no residue in pipeline