Just a week or so ago I was in need of some "high temp epoxy"..........................for the radiator in my van.
Drain plug on my radiator broke. Don't know how, but somehow it snapped off with the part that has the little tangs to hold it in place still in there. Not enough to keep it from leaking of course. Now, due to space to work issues I couldn't get that little snapped-off bit out of there without pulling the whole radiator, which is either a major pain in the butt job for me to do myself, or a pretty expensive one for me to farm out. Neither of which I wanted to deal with. Keep in mind a new plug is about $5 - but I had to get that old piece out of there first. Grrrrr. So, my local trusted mechanic told me that I could always epoxy the broken-off piece back in place........cheap, quick, and easy. Of course this means that if I ever drain my radiator it will be a bit of a pain, but nothing too serious. Sounds good to me, so I opted for the "hillbilly"/"ghetto" fix (note that you can choose whichever phrase is most/least PC for your own sensibilities here - offend or avoid offending however you care to).
What was my "high temp" epoxy of choice? ------- JB Weld.
Worked great. Made sure everything was as dry/clean as I could reasonably get, and just glopped a whole bunch in there and stuck the piece back in place. Since then I took a road trip that took me up long steep climbs and through hours of driving across the hot desert - this over a couple of days that made national news about a major heat wave hitting us here in the southwest. I put in about 600 miles with air temps getting upwards of 107 degrees. You know my radiator was running way hot. Planes in the area were grounded, lots of emergency issues due to the heat blast, people frying eggs with just a frying pan in the sun, and all that. But the epoxy held.
Works for me.
s6