I use a little Permatex "ULTRA BLACK" on all my water jacket contact area gaskets to make sure I DONT HAVE A LEAKY ..just a little goes a LOOOOONG WAY in peace of mind and no leakes.
some say DONT NEED IT ...but a little on the face an back of the gasket SURELY CANT HURT...and I have have no green water on the floor under the 52 or my Guna.
take it or leave it.
Just my 2 pennies.
Tim

1952 Chevy Shortbed

Photos in Photobucket

If It Aint Broke Fix It Till It Is!