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post #4 of Old 03-19-2007
sailingdog
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Wayne-

While I would normally agree with you regarding leaving a gasket thickness and then going back and tightening down after the sealant cures, IMHO this is generally not advisable with screwed down items, rather than through-bolted items.

If you do this with a through-bolted item, you can have some one hold the bolt in place, and then tighten the nut onto the bolt, below the deck. This will not break the seal between the sealant and the fastener or apply torque to the sealant in the fastener hole.

However, if the fitting is held in place by screws, the only option is to turn the screw, which will inevitably break any sealant's adhesion to the fastener and likely to the fastener hole...leaving small tears that water will happily migrate down. It may also tear the sealant in-between the rail and the deck, again leaving places for water to enter.

Just my $0.02 worth on the idea.

Sailingdog

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Telstar 28
New England

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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