Ok I have a couple of exhaust leaks... first my manifold I think leaks so Im going to use the copper spray. That sprray says ots only good to 525 degrees though but Ill try it out anyhow!

Then ima coat the gasket between my turbo and manifold as well...

however where my turbo connects to the downpipe and where the external wastegate connects I have no gaskets and it leaks some there as well.... can I use that copper silicone junk for gasketrs even though it says its only good to 750 degrees??

All and any help is appreciated I read around and searched and found that the copper spray shoulkd work on the gaskets but I dont know what to do where I dont have gaskets!

 

i only have a gasket where the manifold goes on the motor and the turbo goes on the manifold(really dont even need one there).if both surfaces are flat and smooth they should seal.im not using a gasket anywhere else and have no problems.i just always heard gaskets blew out so i just didnt use any,and all my connections sealed.

 

copper rtv is best to work in conjunction with a real gasket. I think you might have mating problems.