Get faster results and a stronger hold with the Bernzomatic SRC300 Lead-Free Rosin Core Solder. It’s ideal for many non-plumbing applications, including speaker wires, appliances, motors and more. This Bernzomatic solder has a silver-bearing that has a higher conductivity, a lower melting point, and a better flow. It also has a rosin core base that eliminates the need for flux. This package contains 85g of solder that has a melting temperature of 230 degrees celsius.