Never had any luck with the cheaper Mr. Gasket MLS - they would not re-seal even sprayed with copper tac.
OK, that strikes me as kind of odd... and disappointing. They certainly didn't COST any cheaper than Cometics, and were supposed to seal better.
FWIW, Mr. G says they are "nitrile-coated". But as I mentioned above, the coating had peeled/flaked off some parts of the gaskets when I pulled them out of their packages. Struck me as kind of a half-a$$ed coating if it didn't survive even that long.
