A premium solder designed with the artist in mind. Made by a special process, ULTIMATE combines tin, lead, and two other metals to produce the perfect solder. It goes from solid to liquid and back to solid instantly with no pasty range, creating a solid, even seam. NO WAVY HEAT LINES in your seams. Work faster than ever while running the smoothest beaded seam. It does the job with one pass of the iron. Melts at 361°F for best results use a rheostat to control soldering iron. Canfield's Ultimate Lead Solder (63/37) sets up quickly making it ideal for decorative soldering. Sold in convenient 1 lb. spools.