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

RustyRatRod said

The Right Stuff is just about the same as Permatex Ultra with a higher price tag. It's still RTV. I'm not knockin it. It works good, but it's high.

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The right stuff is the wrong stuff to use on an engine. unless you are not using a gasket. It is strictly a gasket maker.
You may as well use JB weld epoxy. imo
Don't compare it to ultra, because with ultra you don't need a chisel to get it off.