ClassicGel Flux - Neutra Clean
No mess gel, no smoke, no odor.
Classic 100 Gel Flux is a thickened liquid designed for rapid wetting and shiny solder seams when hand-soldering copper sheet metal or copper foil between stained glass pieces. Non-smoking, odorless and water-cleanable, the residues won't stain the copper before you have a chance to wipe it clean. Also sold in 4 oz bottles.