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I wouldn't be using 5200 to put a port in place. You'll eventually have to remove these ports...and then you'll have a tough time. I would use 3M 4200 rather than 5200 for both sides of the glazing. You shouldn't need to coat or paint the aluminum at all. I would also use 4200 to bed the frame to the fiberglass.
Although you could use a polysulfide-based sealant, it will take far longer to fully cure than 4200, which fully cures in 24 hours IIRC. Polysulfides usually take five or more days to fully cure. For instance, BoatLife LifeCalk says it take 7-10 days to cure... hmm... which would you rather wait... one day or a week?, especially if there is no real advantage to the polysulfide sealant.
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You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.
—Cpt. Mal Reynolds, Serenity (edited)
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Still—DON'T READ THAT POST AGAIN.
Last edited by sailingdog; 04-08-2007 at 08:25 PM.