Oatey 21018 40/60 Wire Solder, 0.125-Inch ga. - 1 lb. 50/50 Alloy of 50% Tin and 50% Lead. 40/60 Alloy of 40% Tin and 60% Lead. 361 F - 421 F melting range for 50/50 Alloy. F - 460 F melting range for 40/60 Alloy. Commonly used for tin plating, seaming joints, copper DWV systems and sheet metal repair. Contains lead. Not for use on drinking water lines. General purpose solder Contains lead - can not be used on drinking water lines Melting range: 360F - 460F 40% tin - 60% lead Use of flux required