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Old 04-17-2021, 10:32 PM   #12
DDW
Guru
 
City: San Francisco
Join Date: Apr 2018
Posts: 3,093
Any caulk you can see worn away from the flanges was doing no good, and will do no good if replaced. The caulk doing the work is under the flange and cannot be seen. If there is a big gap between flange and hull, then I would not put the boat in the water until it is properly fixed. Smearing caulk around and on top of the flanges may be standard practice for an RV roof, but they don't sink if they leak.
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