Many high performance organic coatings will provide the temperature resistance you need - epoxy novolacs, vinyl esters, polysiloxanes, many silicone-rubber based products and even silicates, such as the vehicle for inorganic zincs without the zinc powder added.
The question is what other properties are you seeking?
I recommend you check out the siloxane coatings (e.g. by doing that search on Google)first. You could also visit web sites for coating companies like
International Paint (they have siloxanes and other types),
Ameron
Stoncor, which includes the former Plasite products, including epoxy novolacs and vinyl esters and inorganic zinc/silicates, and
Dow Corning, which specializes in silicone rubber coatings (this is what I think you'll end up choosing).