Do it 1 Lb. Rosin 40% Tin, 60% Lead Solder is designed for general-purpose use and is i for a variety of repair tasks including gutters, auto radiators, and filling metal seams. This solder a reliable blend of 40% tin and 60% lead, making it effective for these applications. It is important to note that this solder is not suitable for plumbing or electrical repairs, where specialized solder types with different compositions are required. follow safety guidelines and select the appropriate solder for your specific project to achieve results and maintain safety. Model Number: 53051