[rotorwrench]

I've used Devcon plastic steel and their clear epoxy kits. It works well enough for what I needed at the time but use of epoxy comes with all sorts of application problems. Some epoxy resins are made to take a lot of heat but a person has to know how much it can take. Expansion due to heat cycles can be problematic. Adding a liquid like anti-freeze and water can also affect the long term stability of an epoxy resin bond. I'd say that any epoxy repair would be a temporary fix. How long it would last, I don't know. JB Weld may be as good as anything but Devcon has a lot of products to choose from in their line. JB Weld only has a few selections such as fast cure and regular cure. I don't know how much heat it can take either. In any case the surface will have to be clean and dry to get a good bond.

Most radiator tanks have a tray that is soldered to the top and bottom of the core to mount the tanks. It's best soldered on the inside of the tank which means pulling the tank to do it right. If the tubes are corroded and frail then a resolder may not last. It's always crap shoot with old copper & brass. The stuff lasts a long time but not forever.

San Antonio used to have a good radiator shop but the last time I looked it was gone. I found a shop that said it could help me and they did but it's gone now too. A person would think there would be at least one in a city this large but most of them are just peddling new plastic and aluminum radiators made off shore. They don't repair those. The days of copper and brass radiators is long gone now. Only a few remain in this niche market and they are few and far between.