You can seal with CPES, see: http://www.rotdoc.com/boat/02sealer.html

"Cheshire" wrote in message
news:9PLsb.2775$ux.1090@okepread04...
I notice that teak finishes often fail where the teak meets metal, because
water is able to infiltrate through the tiny unfinished cracks. It has
been
suggested to me to apply a tiny bead of clear caulking on those edges, but
I
think it would be difficult to achieve a satisfactory result (especially
with the five thumbs on my right hand.) I was wondering if an epoxy would
seal it up.

Also, I noticed one old post, where it was suggested that a thin epoxy
coat
should be applied to the wood, before applying the finish. Is this a good
idea?

Thanks.