I'm rebuilding the Port Light on a Tartan 30. It consists of two
aluminium bezels and a plexiglass "window". The two bezels are held
together by barrel nuts and bolts, and overlap the coach sides and the
plexiglass.

I believe I need to seal the outer bezel to both the plexiglass and
the outside of the cabin top with some sealant. It looks like the job
was done with silicone by the factory, 30 years ago.

I've seen some claims that there are good and bad forms of silicone
for this. Other claims that something like Boatlife is a better
choice.

Obviously, I want to use something that can be undone if it leaks
again - no 5200!

Suggestions?
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