I was given several spools of old-fashioned solder . So it is solid wire, no flux (and probably has some lead in it too). Gave that a try on 12 ga and it didn't work very well at all without flux. Wouldn't wet. Tried the same with modern flux core solder wire and it was a breeze despite my shaky technique. So I'm wondering if one can still get the flux separately. Looked at 2 hardware store nearby and they had plenty of flux for plumbing but nothing for electrical. In fact, the flux I saw said clearly "not for electrical".
Can one get the flux separately? If so, what type would you recommend if there is a choice?
Can one get the flux separately? If so, what type would you recommend if there is a choice?