If you want it to melt below 430 F buy lead, but if you're good at soldering electronic circuit boards and have the best iron, look for this best what you are looking for. Doesn't smoke, runs perfect, flows perfect, is a god when it comes to soldering. The product and maybe me a bit. lol If you burn tips you will have soldering problems so just buy lead, use it outside and avoid smoke as it contains lead. Never use it on a pipe or anything connected to water sources and you'll be happy tooβ¦