With Oatey silver solder powder added to pre-tin copper pipes. Cleans, fluxes and tins. Lead free, can be used on potable water systems. For clean sweat copper fittings, no pre-cleaning needed. Do not use on electrical parts. Formulated with the same quality as Oatey No.5 flux. Will work for large diameter copper and does not turn copper green. Can never burn out.
