SOLDER-IT silver bearing solder paste in easy to use, no mess, no waste syringe. Soldering made easy - the skill is in the paste. Made from premium refined powdered metals. Ready to use - Flux is blended in, just add heat. No additional flux required. Works with the heat of a torch or soldering iron. Low melting point - flows smoothly at 430°F. Use with butane torch, soldering iron, propane, acetylene or map gas torch. Will join 22-different combinations of metals. 5-times as strong as ordinary solder. Finished joint is bright silver and won't tarnish or blacken. Great for electronics, wiring, connectors and circuit boards. Repairs copper, brass, bronze, nickel, platinum, chrome, coated steel, cast iron, black steel and steel. Stress and vibration resistant. Provides strength without the distortion of high temperature brazing. Extremely high electrical conductivity.