Bill,
I love 5200. It's fabulous stuff, but as a flexible, permanent adhesive, not
a sealant. Bronze will work underwater IF it is not electrically connected
to any other metallic object that is not also bronze. As your hull is
plastic, you should not have an issue.
Steve

"Bill Bligh" wrote in message
...
First I bought a brass drain, then 'Oh No, brass in salt water...'
Then, Bronze.......Then, Oh, look at the one claiming to be stainless
steel.

Now, Bronze drain, Bronze hardware, WEST epoxy to seal fiberglass
penetrations and 3M 5200 as adhesive, sealant and whatever.

Bonding and corrosion are my concerns.
Perhaps, best would be to install using the Bronze and beach her
every few weeks to look for corrosion?

Does anyone have strong favorites and faith in choices for this
project?

Thanks,

Bligh (Bill) (Cptn)