Head Bolt Thread Sealant

[Jocko_51_B3B]

Looking for suggestions for a really good head bolt thread sealant. I'm considering the following Permatex products:

1. Aviation Form a Gasket

2. Pipe Joint Compound

3. Indian Head Thread Sealant

4. Ultra Black Gasket Maker

Other ideas that might be better?

[cavisco1]

Try Permatex High Performance Thread Sealant pn 56521 on fasteners that penetrate the water jacket. I had good success using this on a timing cover bolt that penetrated into the water jacket on a 3800 v6. I had previously tried some of the silicone products without success,  but the permatex thread sealant did the trick.

[Matt Wilson]

You might consider Permatex high-temperature thread sealant 59214P.  It's advertised as being good for head bolts into through holes.