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Old 09-09-2016, 08:45   #1
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Join Date: Jun 2013
Location: Panama
Boat: Lagoon 410
Posts: 4
Leaking water tank

Have a lagoon 410, built 2000. The plastic water tank has developed a leak. What is the method for repairing and sealing a leak to a plastic tank? I expect I need to match the polymer. If it helps the plastic is green.

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Old 09-09-2016, 09:36   #2
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Join Date: Jul 2015
Location: Burnt Store Marina, Punta Gorda, Fl
Boat: Cabo Rico 38
Posts: 6
Re: Leaking water tank

I had a leak in a water tank that was made of Fiber Glass. I could not find the source of the leak but suspected it was stress cracks as the boat is a 1987. Thru another forum I was put in contact with a specialties coating company in Washington State. They have a two part coating that meets FDA standards for contact with food. In talking with them I was told the coating is somewhat flexible when cured and to just coat the entire tank. No More Leak. The link is below

FDA rated epoxy paint and coatings product. For use on potable water tanks,brewing tanks, etc.

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Old 10-09-2016, 14:41   #3
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Join Date: Feb 2011
Location: Sydney,NSW, Australia
Boat: Lagoon 400
Posts: 136
Re: Leaking water tank

You can get small plastic weld repair kits from hardware, here in Australia I found one in Bunnings, they have repair rods for the different plastics, I did some repairs on some sea kayaks which worked well, I contacted the company that made the kayaks and they sent me the plastic in the colour I needed for the repair.
Dream as if you'll live forever. Live as if you'll die today.
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Old 13-09-2016, 13:28   #4
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Join Date: Jul 2011
Location: now in Marathon..Boot Key Harbor
Boat: Lagoon 410
Posts: 323
Re: Leaking water tank

Need more info. Is it a small leak or large? Is it leaking towards the top or bottom? Is it leaking at a seam? Is it leaking where you can get to the leak? Something as simple as a dab of 5200 may work...
Back in Annapolis waiting for October!
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