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Old 06-10-2010, 04:02   #1
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Epoxy Potable Water Tanks

Has anyone had much long term experence with marine ply and epoxy tanks coated with a food greade epoxy? The food grade epoxy I looked at was Bar-rust, and also NSP120. Both are NSF approved for potabel water usage. The kicker is that they were approved for 1000 gallon tanks. Our smaller tanks will have much more surface contact to volume ratio. Is this any concern? Combined with a General Ecology filter I suspect that it shouldn't be a problem. I spoke with tech support as system three, and MASS and both said that their product was not certified for potable water use, but both said that they would use it for potable water use. They said that after fully curring after a week or so that the solid plastic that epoxy forms is inert. West System reccomended double mixing is 2 seperate pots with 2 seperate mixers to FULLY mix epoxy used in potabe water applications fpr a complete uniform cure. It seems that integral tanks are the best value to volume that you can get. But what about the long tem effects?

Also check out: Atom Voyages | Voyages Aboard the Sailboat Atom - Integral Watertank Construction

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Old 06-10-2010, 06:59   #2
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sounds like you just formed the test group

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Old 06-10-2010, 07:26   #3
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My old Prout had the original direct against GRP tanks replaced with some plastic bags. Not very good but they are potable rated. I fancied makingg some up from flexible water rated hose, say 4 or 6 inch flexible lay flat stuff like the old fire hoses.
It gives you multiple tanks, should one go bad.
Ex Prout 31 Sailor, Now it's a 22ft Jaguar called 'Arfur' here in sunny Southampton, UK.
A few places left in Quayside Marina and Kemps Marina.
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Old 09-10-2010, 13:12   #4
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I would be most interested in what you find out. Custom plastic tanks are extremely expensive. Can see no reason not to fabricate with plywood coated with something suitable.
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