RTV, Permatex, Aviation Form-A-Gasket, The right stuff etc....

I used the ultra black on all the bottom end stuff and used jb weld blue rtv on the intake water pump timing cover etc because it matched the paint color and isn't as noticeable visually on the engine. Funny thing that this was mentioned today because I was talking to the son of my machinist today (he is also an engine builder 3rd generation) he said he only uses and swears by it "the right stuff" ill give it a try on my next one