Thread sealant for exhaust studs

[Cdnone1]

Hello.
I am looking for advice on thread sealants. I am restoring an old 1982 Fiat 124 Spyder. The exhaust studs go through the head into the oil chambers. They apparently leaked when new 40 years ago and are leaking pretty good now. I am going to pull the studs, clean both areas and then will reinsert them. Looking for recommends on the best high temp thread sealant for this application.
Thanks
Steve

[john walker's workshop]

Look up Permatex high performance thread sealant #56521.

[Cdnone1]

Thanks John!
Appreciate you taking the time. I was hoping you would make a recommendation.
Steve

[dannobee]

Loctite 592 for high temp sealant that you want to solidify in place.

[Henry Schmidt]

What we use in ultra-high temp environments is Loctite HL235579 Fixmaster 2000 Putty.
Anything exhaust related such as damaged 964 exhaust port liners.