Thanks, Ray, for starting this link. I went through this several months ago when I went to lube my new-to-us 2007 C7. I was trying to find a local source for the Pac brake lube everybody uses. I called the company (Super Lube) and talked to one of their reps. I told him what I wanted to use it for and he said the problem with that lube is that it doesn't penetrate very good. He recommended a spray that had a vehicle in it that allowed the lube to penetrate, and then evaporated leaving the lube behind. He recommended their product 31110. http://www.super-lube.com/super-lube-multipurpose-aerosol-ezp-68.html
Now here is what puzzles me...all of the Super Lube products seem to have a flash point of 450 deg F. That seems to be pretty darn low for a component in the exhaust flow. The Permatex spray you used has a much higher flash point and seems like it would be much better suited.
Anybody have any thoughts on it? I like the idea of the spray to penetrate better, but would like the higher temp performance.
Thanks,
jeff