
Originally Posted by
Mechanic688
Looks to be a flux used with a metal brush and not solder at all. And according to the info after 8 months the efficiency starts going downhill.
No Mech
I was reading a bunch of pages on this stuff. I would call it a flux like solder. It's paste made with very fine tin/AG grit/dust. I couldn't find one thing relating to plumbing use.
Most of the pages talked about circiut board stencils.
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