Sealant around engine block coolant neck?

I've got some pitting on the coolant neck at the top of my engine block, and I want to avoid seeping coolant on my brand-new restoration.

Has anyone used sealant that works well other than RTV silicone? I don't want it to be totally stuck on if I have to replace it sometime, so I was thinking of the non-hardening intake manifold sealant.

Any recommendations are appreciated.
Thanks,
-Art

I had the same problem on the top of my intake and nothing I tried would seal it from seeping until I took a flat sharpening wet stone to the top of the intake to file down the pitting, then I used the red high temp RTV sealant at the bottom of the T stat housing gasket and have not seeped a drop since.
I use a billet steel housing, never chrome.

Some guys may have better solutions but that's what worked for me.

Permatex brown.I use it all the time.It dosent hard and stops any minor leaks.Rocky

Permatex Hylomar

http://www.amazon.com/Permatex-85249-Hylomar-Universal-Dressing/dp/B0018PSATY

Permatex #3 brush on, on a gasket

Thanks gentlemen!
- Art

File and smooth as best possible and Permatex #1 (brown). It seems to work much better than RTV in this app.

What ahy sez: gotta have flush smooth surfaces, then the Permatex. I like anti-sieze or bolt-prep on the bolt threads, too. And test your thermostat in some boiling water with a thermometer before installing it.

Quote:

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Permatex Hylomar

http://www.amazon.com/Permatex-85249-Hylomar-Universal-Dressing/dp/B0018PSATY

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I usee it alot on my engines. Works great on valve covers too. Never gets hard