Whats the best way to seal the plate on the TG?

I've tried liquid gasket but it leaked. Removed the liquid gasket and then tried a rubber gasket but that leaks too.

Should I use a cork gasket?

I've made sure both surfaces are clean. Does not seem to have an pitting or scratches around the plate surface. My best guess is that the leaks are coming from the bolt thread holes. Should I use locktite on them?