Re: Is JB Weld a hole filler or a real metal replacement?
Well, if anyones interested, furnace cement is unbelievably hard stuff. Don't know about its bonding limits but like I said it is good enough to seal up a completely burned out fire pot (where the hot coals are) in a furnace. Thus, the name "furnace cement". And when shaping it, a high speed grinder is barely a match for it. Takes forever to grind it. Probably comparable to the hardness of the rear sproket when I had to enlarge to hole.
Anyone ever used it?