On Tue, 29 Mar 2011 01:47:32 +0100, Gazz wrote:

old seal was a thin O ring, new seal is a waxed gasket the width of the
entire flange seating area, still leaks, but not as much,

what would be the recomended sealant to use on the flange?

Fernox LSX. Silicone will no doubt work but how easy it will be to
break the joint again later is another matter. Getting immersions out
can be a barstweard of a job with just corrosion let alone an
effective glue in the joint...

they do a washer that looks like it's a fiber type, would one of those
be better?

As the thin(?), relatively hard(?), waxed gasket hasn't sealed that
suggests some distorion or damage to the flange, either or both
sides. A thicker, softer, fibre washer will conform better to the
distortion and thus stand more chance of sealing. Fibre washers also
"selfseal" as they expand when they get wet.

--
Cheers
Dave.