40/60 alloy of 40% tin and 60% lead. 50/50 alloy of 50% tin and 50% lead. 361. General purpose solder for sheet metal work, auto radiator repair and steel gutters. 40/60 solders are 40% tin - 60% lead. 50/50 solder is 50% tin - 50% lead. Contains lead - can not be used on drinking water lines. Acid flux is contained in the wire core; no external flux is needed.
Lower melting point which means better coverage and easier spreading than other solders. Highly recommended for wires and projects where you need a good fusible solder.