Project Cheap & Nasty Updated With Back Story

Which is fine, because Permatex № 2 is a few hundred miles closer to being an appropriate material for this application than RTV.
Technically, I'm in agreement. However, there are a couple of reasons I personally prefer high temp RTV. First off of course, it seals. Then it withstands heat. Lastly, it also acts as an anti seize. I've always had good luck with it on bolt threads. It works "for me".