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Old 12-07-2017, 01:03 PM   #1
Wheelhouse
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Flex Seal Products

Has anyone used the Flex Seal tape or sealants on a cracked holding tank?
I have used the proper patch kit on my galley holding tank that still wants to leak?
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Old 12-07-2017, 02:50 PM   #2
rohrmann
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If your tank is ABS, the black plastic material that is the same as the black plumbing pipe used for vent and sewer piping, you can use Plasti-mend. I repaired a crack in the bottom of our grey tank with one of their kits, and it is solid, no leaks. I don't really think any tape product will hold for the long term.

http://plasti-mend.com/cart/index.ph...tegory&path=59
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Old 12-07-2017, 02:55 PM   #3
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Flex Seal prod's are junk I have seen guys use them and they don't as seen on TV.

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Old 12-07-2017, 03:42 PM   #4
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I used JB Weld PlasticWeld to repair a tank on a SOB that I used to have.
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Old 12-07-2017, 04:09 PM   #5
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Snap Pad now recommends, in their installation manual, to spray a coat of Flex Seal on your foot pads prior to installation. I wire brushed mine, then put a coat of Rustoleum on them. Once that was dry, I sprayed on a coat of Flex Seal, then installed the Snap Pads.
Wouldn't use it for a leaking tank. It wouldn't hold.
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Old 12-07-2017, 05:35 PM   #6
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I used flex-seal on the roof of my old class A on the front roof seam. It lasted three months and then flaked/peeled off. Not recommended.

In an emergency eternabond will seal a cracked holding tank or shower pan or water tank or skylight or roof leak. I always carry a roll of 4" just in case.
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Old 12-07-2017, 10:59 PM   #7
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I was just imagining a commercial with Phil Swift applying Flex Seal to a leaky black tank.
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Old 12-07-2017, 11:52 PM   #8
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Quote:
Originally Posted by Bad Moon View Post
I was just imagining a commercial with Phil Swift applying Flex Seal to a leaky black tank.
And then just think of how he would show that the tank was leak free
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Old 12-09-2017, 06:25 AM   #9
masterdrago
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Ditto on what Rohrmann says. Have used Plasti-mend on a number of things. Works very well. Not sure how it would hold up on something that flexes a lot.
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Old 12-09-2017, 10:57 AM   #10
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I used flex seal on my old Cougar roof. In about 4 months it turned yellow, looked like ... really bad, and it also peeled. But only in places so it made it look worse.
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Old 12-13-2017, 09:28 AM   #11
Wheelhouse
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Great replies from all.
I had mixed feelings on using the flex seal products and see it was best to hold off.
I used the recommended repair product by the forum and the leaked continued. Good thing it is the galley tank and not the black tank.
Thank you for the replies.
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