Haha JB weld...I repaired a smunched radiator, leaking at the base of 3 fins, with JB weld (not the "JB quick") and have been riding on it for about 18 months now LOL Been meaning to replace it but it doesn't leak...
Yesterday a stick jammed UNDER my buddy's radiator on his 11 EC300 breaking the lower nipple off. Lost all his coolant. We repaired it with quicksteel, let it dry for 45 min, and filled her up with our precious drinking water. Rode for another four hours of hard, slow, hot singletrack and it never leaked a drop.
Quicksteel dries in 20 minutes or so. JB weld much longer. Quicksteel better for trailside fix IF you can get it where you want it (probably won't fit between radiator fins very well)
I fixed a magnesium side case on the trail with quicksteel. Never leaked.
Also a rock punched a hole in my buddys quad wheel (rock jammed between the axle and the wheel, punching a hole in it...another reason to not ride a quad haha). We were 20 miles from the truck in the Moab desert. Filled the hole with quicksteel. That was 5 years ago, still riding it like that LOL.
Now we all carry quicksteel. and some plumber's sandcloth to roughen up the bonding surface.
But for garage repairs, where I have 24 hrs for it to dry, I use JB weld.