Will hot ethanol eat through flame hardened PVA glue? Answered
I'm still working on this solar thing and it's coming along pretty well, am starting in on the final piecing of things together.
One old problem that has resurfaced tho is the sealing of the boiler. I was using a metal epoxy similar to Quicksteel, which handled the ethanol ok but is going soft and cracking off, I think due to the regular heating > 80C.
So I'm once again looking around for other options. What I'm trying now is wood glue, which I assume is just PVA, run over a flame so that it becomes hard. It seals the ends of the flattened copper pipe well, and doesn't immediately fail on contact with ethanol.
Is it likely to hold up, do you think? I'm kind of assuming it won't, but it'd be great if it did.