...both the gasket supplied with the adaptor plate as well as the gasket that came with the pump. As for the sealer, I prefer a light coating of #2 Permatex on both side of the gaskets...
That makes perfect sense to me, a gastet on both sides and light coating of permatex #2 applied with a finger to both sides of the gaskets.
Permatex #2 is great stuff, and a gasket is sitll required.
Grigg