Yeah, Permatex bought the rights to make it here and sold it for awhile in basically every auto parts store across the US; which apparently convinced the other importers to quit bothering.
Then Permatex apparently ran afoul of US emissions law (or possibly just some internal "green" directive) and suddenly stopped selling it. I guess HF saw an opening and brought in a shipload of the stuff.
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Randall
59 TR3A TS39781LO (now totaled

)
56 TR3 TS13571L current project
71 Stag LE1473L waiting engine rebuild
71 Stag LE2013LBW waiting gearbox rebuild