Is Copper rich rtv sealant any good for exhaust gaskets?

[xorph]

Had about 1 minute to get something from repco before it closed, so got a squishy tube of 'loctite copper maxx instant gasket'.
On front it has a picture of someone squirting a ring of it on to the flange of some headers. sweet! should do the trick...
Im using it for some home-made flanges on my turbo in a diesel cruiser.
On the back of tube it says 'resists over 316 deg C' and then in small print 'not recommended for exhausts'
Has anyone used this or similar for exhausts?
I think turbos get hotter than 316, on petrols definately.
I stuck it on anyway because im a fool.
If it doesnt work, what is a better alternative.
-I am not buying the factory 87 supra turbo gaskets from toyota! $120 each!

[mercutio]

maniseal is the stuff :thumleft: :thumleft:

[kdub104]

dont wana start a shit fight but ive got some big machines that run from 3a.m till 5ish and ive always used high temp sealant on any flange joint(orange stuff)just seem to handle the extreme temps better.

had a go with the so called maniseal and its crap under extreme temps etc .

[xorph]

Thats good to hear, Ill give it a thrash tonight and see.
If it doesnt work hopefully ill have heaps of graphite gasket left over from a furnace rebuild project im working on. we actually use loctite red high temp rtv to stop a lot of gas leaks around seals/flanges in the furnaces. it sort of almost works.

[IcedJohnno]

. we actually use loctite red high temp rtv to stop a lot of gas leaks around seals/flanges in the furnaces. it sort of almost works.

You're on to it, thats the stuff to use. Red Loctite Hi Temp RTV. Have use it for years as exhaust flange gasket cement and it works well.
I think the copper stuff is a far lower temperature rating
Cheers John