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Getting some leaks

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Old 05-22-2019, 05:09 PM
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Default Getting some leaks

Iím pretty sure that Iím getting leaks from my rub rail. I get water coming into the engine bay on identical sides at the joint in the hull and in my cuddy. Iíve decided against sealing the leaking spots in the engine bay, I think thatís the design to indicate bad rub rail seals? Is it? Should I pull the rub tail off and check under it? The rub rail needs to be re-caulked regardless so whatís the best method, slow steady hand and 3m marine silicone caulking?
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Old 05-22-2019, 07:30 PM
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Originally Posted by Prestigeworldwideee View Post
Iím pretty sure that Iím getting leaks from my rub rail. I get water coming into the engine bay on identical sides at the joint in the hull and in my cuddy. Iíve decided against sealing the leaking spots in the engine bay, I think thatís the design to indicate bad rub rail seals? Is it? Should I pull the rub tail off and check under it? The rub rail needs to be re-caulked regardless so whatís the best method, slow steady hand and 3m marine silicone caulking?
is rub rail underwater? If you want to seal it just remove rub rail at back of the boat and silicone the hull/deck joint.

how low slung is this cuddy?

Could be the hatch.
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Old 05-22-2019, 09:57 PM
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Well, there is no hatch and the rub-rail visibility needs to be re-done. Thereís sections actually missing caulking and I can see where in the cuddy itís leaking along the rub-rail joint. The stern rub-rail is in the water when the boats not in motion. Is it fairly easy to remove from the back rub-rail to seal it? Iím just worried that Iíll seal the wrong spot, water will get trapped in the rub-rail, expand and ruin something during the winter....
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Old 05-22-2019, 10:08 PM
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looking at pics, it shouldnt be underwater..... And do not use 5200. I dont care what your mom's boyfriend's cousin's buddy tells you, do not use 5200. You want a sealant not an adhesive. you are not permanently attaching the rubrail and screws.
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Old 05-23-2019, 12:50 AM
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The proper way to do it is to remove the rubrail and then seal the joint between the hull and deck.
You can use 3M 5200 for that and it will strengthen the joint as well.
When you reinstall rubrail, put some silicone into the holes before you screw it back on. You should not need run a bead silicone on the actual rubrail.
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Old 05-23-2019, 05:50 PM
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Originally Posted by phragle View Post
looking at pics, it shouldnt be underwater..... And do not use 5200. I dont care what your mom's boyfriend's cousin's buddy tells you, do not use 5200. You want a sealant not an adhesive. you are not permanently attaching the rubrail and screws.
its submerged enough at times, especially when people are sitting on the back platforms, the water goes over the platform at that point.
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Old 05-23-2019, 06:04 PM
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Easiest confirmation is If you pop the engine hatch when you have everyone in the boat, you will probably see water coming in at the seams...3m Silicone will stay flexible and seal up the seam where the hull and deck meet and each screw should be pulled. Using 5200 will work but if you have to replace a section of the rub rail backing - you are in for a fight to get it off (5200 will hold trim tabs to a hull so it will definitely hold a rub rail).

Long story short, your in for a bit of a job but you have to seal the hull/deck (behind the rub rail) and each screw hole
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Old 05-23-2019, 06:19 PM
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Originally Posted by speicher lane View Post
Easiest confirmation is If you pop the engine hatch when you have everyone in the boat, you will probably see water coming in at the seams...3m Silicone will stay flexible and seal up the seam where the hull and deck meet and each screw should be pulled. Using 5200 will work but if you have to replace a section of the rub rail backing - you are in for a fight to get it off (5200 will hold trim tabs to a hull so it will definitely hold a rub rail).

Long story short, your in for a bit of a job but you have to seal the hull/deck (behind the rub rail) and each screw hole

If he uses 5200 to stick the rub rail on, and he or somebody else ever tries to take it off, they are liable to rip up the shoebox joint pretty bad..... 5200 on the hull to deck in the joint is good, but make sure its cured before installing the rub rail.
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Old 05-23-2019, 06:25 PM
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Originally Posted by phragle View Post
If he uses 5200 to stick the rub rail on, and he or somebody else ever tries to take it off, they are liable to rip up the shoebox joint pretty bad..... 5200 on the hull to deck in the joint is good, but make sure its cured before installing the rub rail.
I never intended to use 5200 to put the rub-rail on... anyways speicher lane -sounds about right to me. I donít wanna seal the hull joints, I think Iíll run into problems later but pulling the rub-rail, sealing the screws and caulking the rail is what sounds like Iím gonna have to do. Thanks for the help, I originally was just gonna seal the rub-rail but I see how that could only solve half the problem. Iíll update this when all is done.
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