I usually use Permatex Ultra Grey for everything and that was my plan for this project. Then I read someone's theory online about the excess silicone squeezing out (inside) and breaking off eventually. That then stars to partially clog the oil pump screen. Well, I bought into it (kind of) and it scared me off, especially this project where there is a lot of surface that gets coated with a sealer. Oh well, Ive had good luck with these other sealers in the past and they appear to be doing a good job.