Nothing Permatex or RTV related will work on Nitro.....the only stuff that is actually Nitro Proof is the Racer's edge stuff already mentioned...but the Original Product is Three Bond 1211....the Racer's edge smells Identical to 1211...and the 1211 is a little stretchier and easy to apply....all sealant is a pain to remove..but using the Right sealant is 10000X more important....and Ill 2nd what Steve Walters said..."I spend too much time and money racing to even take a chance."...its Just Not worth it.