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63/37 Solder – Kester Sn63Pb37 Solder Wire

Shop 63/37 solder wire for electronics assembly, PCB work, repair, and general soldering applications. Also known as Sn63Pb37, 63/37 solder contains 63% tin and 37% lead and is a popular choice for electronics work. Our selection includes Kester solder in multiple wire diameters, flux formulations, and spool sizes, making it easy to choose the right solder for your application. Browse Kester 63/37 rosin core solder and find the diameter and flux type that best fits your work.