Yes, and I imagine that it's
Yes, and I imagine that it's the same thing with those manifold leak fixers in a can as well. Chris Fix shows how to use one to stop exhaust from leaking from the manifold, but I'd hate to be the one to try to get that stuff off to fix it properly later on. It's an emergency patch, but knowing that when it comes to taking an old exhaust manifold off, it often means typically breaking off the bolts into the block---I can't be judgey about it when someone cannot afford to pay someone to do it right. But not the other hand, God knows how often used car problems are hidden this way too. Oh well. Anyway, thanks for the input---much appreciated.