I really don't remember when JB weld came on the market but back in the early 70's I worked at a generator, starter repair shop. We use to use something that looked almost like JB but I think the ratio was 1/2 to one. You mixed it just like JB and then would spread in over the diodes and where the wires connected on heavy duty truck alternators to keep the vibrations from the wires to brake off the lead in the diodes. I had bought a Case tractor from some one for around $150, (nice tractor) it was a basket case. Engine tore apart, a main bearing had spun in it taking out the crank and wiped the saddle and cap. I finally found a place that built the crank back up but could not find a machine shop that could build the block and saddle back up and line bore it. I installed all the other main bearings, cleaned the bad main cap and block up real good, mixed up some of that epoxy, spread it all over the cap, and block, laid the bearing in it, and then the crank, bolted it down just hand tight, let it set for a day with a heat light on it, then torqued it per specs. I used the tractor for several years and finally sold it and made a nice profit and as far as I know the owner is still using it. I think the epoxy was made by Delco Remy. It came in a tube about 5 times larger than JB. I bought a couple of tubes but over the years used it up. I also had a Cat engine that the cam had spun a bearing, polished the cam up, got a new bearing and cleaned the bore up real good and installed the bearing then put the cam in right away,, let it set for a couple of days and start it up. Still running. Red Neck repair shop.