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

You have to watch your *** on things like RTV, and I've been guilty. NEVER use it on oil pans although I've used it on the front/ rear "half moon" seal area. Crap is hard to remove. I used to like "hi tack." Oil pans, water pumps, timing cover, and the water ports on intake. I used to glue the rocker cover gaskets to the covers with that, then just use a finger film of oil around the head side of the gaskets.....solid lifters.