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Old 02-23-2007
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PBzeer PBzeer is offline
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The purpose of backfilling the hole isn't to stop water intrusion, it's to keep it from getting in the core. No matter what you use, eventual, you will get some leakage over time. By backfilling, the water does not get into the core and cause much more serious, and expensive, problems. Caulk the screws, since you don't want them leaking, but do the backfill as well.
That's why all the newer boats have solid glass at bedding points, to keep water from the core.
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