Thermostat gasket leaking AGAIN!!!!

I would check bolt length and see if the manifold bolt holes are clean, especially the bottoms of the holes. Have you checked the manifold itself, maybe take a fine cut flat file and gently surface the manifold area. Check for cracks around the bolt holes and cracks in the housing.
i do appreciate all the reply's and help to try and resolve the leak, but i still have not found an answer to "Is the gasket failing?" i can use all the sealer i want but if the gasket sticky surface is removing itself from the gasket it doesn't matter that i used RTV, Aviation, or nothing at all on that side. pardon my drawing but this is what i seen the first time i had the leak.

1721401513129.png


the sealer was stuck to the film on the housing, and the gasket was stuck on the intake. when i removed the bolt i didnt even have to use effort to remove the housing. the gasket was stuck to intake and the film was stuck to the housing, had to scape them both clean again.
With the groove for the stat flange in the neck and not the intake, the gasket goes down first, then the stat and neck. Most likely to leak where the gasket is thin between the bolt holes and come out around the bolt shank, or the stat could be offcenter and pinch between the neck and intake.
yes thats how it is.