This J,W, Harris 10001 Stay-Brite Lead-free Silver Solder is a lead-free solder that is ideal for use in electronics and other applications that require a solder with low lead content. This solder is also non-toxic and has a silver content that makes it ideal for use in applications that require a silver solder. This J,W, Harris 10001 Stay-Brite Lead-free Silver Solder is a lead-free solder that is ideal for use in electronics and other applications that require a solder with low lead content. This solder is also non-toxic and has a silver content that makes it ideal for use in applications that require a silver solder.