Exhaust Leaks, Paste?

[Jon Pennington]

My G20 has a persistent leak that forms somewhere around the Hot Shot
g4 header, original cat, and a VRS stainless exhaust.  The last time I
had it looked at, a greasemonkey heated the studs with a torch,
grabbed his longest wrench, and nearly hung from it (I know that's not
good for the stud), and that worked for about six months.  There are
problems I have that aren't helping; no front motor mount, worn out
hangers, etc.  I'm going to fix all of the other stuff, too, but I
need that leak to go away forever (or close).

I watch Wheeler Dealers and Auto Trader on HD Theater, and their
resident greasemonkey, Ed China, keeps using this stuff he calls
exhaust paste on the mating surfaces when he replaces the exhaust on a
car.  According to him, it cures over time + heat, supposedly ensuring
a leak-free seal for a very long time.  Ed does a lot of stuff that
makes me laugh or cringe, but this stuff got my attention.  Does
anyone know if it's legal/available in the US?

-- 
-=|JP|=-     <//><

Why, yes, I *can* cross-thread a ketchup bottle.