"Blueskies" wrote in message m...
I was thinking ProSeal or similar for the interface...

I was too, until I looked at the temperature resistance of
polysulfides (ProSeal being that). It's pretty low, it releases
pretty completely at about 250 deg F, whereas the cheapest RTV starts
from there, and they have readily available compounds that go up to
700 deg F or higher.

I've always looked down my nose at RTV, and I've seen many jobs
bodgered up using it, but in this case, I'm beginning to believe it's
the right goop for the deal.