Quote:
Originally Posted by mchell
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x3 on the ultra black, or ultra grey. ive used it on a few motors in the last 10 years or so & it works great & lasts a long time. i use it as a dressing on timing covers, valve covers, valley pans, etc. my machine shop also used it on my milodon oil pan that comes with the older style crappy 3 prong rubber "U" seal in the rear that would not seal after 2 tries. talked with mr P body & he suggested using the 1/4" cork gasket in that location & a liberal coat of ultra black... been holding great after 6 years & lots of street miles, drag strip runs & some dyno pulls. all other gaskets on 3 of my cars are leak free after 8-10 years too.
all the other products mentioned will work too but to claim (modern) RTV shouldnt be used on gaskets is not correct... as posted above, permatex says ultra black/grey can be used as a gasket dresser, meaning a light thin coat on both sides, especially for pitted surfaces.