Stay-Brite silver solder is 5 times stronger than standard solder yet melts and flows freely at only 430Adeg F, minimizing the potential for distortion caused by high temperature brazing. It securely joins all metals except aluminum, including stainless steel and cast iron, and can be used with a soldering iron, torch or resistance soldering equipment. Kit includes 1/2 oz. of solder and 1/2 oz. of flux. Solder composition is 96% tin and 4% silver.