Oatey 30013 Paste Flux, 4-Ounce, Yellow
Cleans and fluxes at the same time. Blended to clean surface oxidation. 100% lead free. Effective on all metals except aluminum, magnesium, and stainless steel. No pre-cleaning necessary for clean sweat copper fittings, for other applications clean excessive dirt and corrosion. Do not use on electrical parts. Use with solid wire solder.