First...... understand that there are two categories for these products.... Auto and Marine.
The Automotive version of Anti-Seize/Never-Seeze may contain aluminum, copper, graphite, etc., suspended in an oily product.
The Automotive version is excellent at/on warm/hot engine related fasteners, and is NOT intended to be used below the water line!
When subjected to water, the aluminum, copper, graphite, etc will cause issues!
The Marine version of Anti-Sieze will not have these components and will be more of a rubber-cement type viscosity (much like the QuickSilver "Perfect Seal"), mainly intended to prevent corrosive water intrusion. This version is intended to be used below the water line.
I would NOT use it at/on warm/hot engine related fasteners.
In asnwer to the thread question...... YES ..... Automotive Anti-Sieze or Never-Seeze is a very good choice for exhaust manifold fasteners.
I would use caution in areas of potenailly wet threads, such as some Manifold-to-Elbow fasteners.
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