Description Alloy of Tin, Copper, Silver, and Bismuth that works much like 50/50 solder. Recommended for use on potable water systems for sweating copper joints. Also effective on stainless steel, brass alloys, chrome alloys, galvanized steel and cast iron piping. Works with any high grade paste or liquid flux and a standard propane torch. Oatey No.95 tinning flux recommended. Provides excellent flow and fill characteristics. 420 to 460 degrees F melting range; 0.117" diameter. Meets ASTM standard B-32 and the requirements of Safe Drinking Water Act. Can Not Be Used On Aluminum.