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Old 04-14-2014, 11:46 PM   #15
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1972 31' Sovereign
1975 31' Excella 500
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Replacing my belly pan and drilled through my black water tank

If a decent epoxy is applied to clean, dry, freshly cut threads it will stick and damn good,

A person could add some insurance by scuffing the area where the screw or bolt head will contact the bottom of the tank just to be sure if there are any doubts. (I would scuff it aggressively)

Epoxy WILL form a mechanical bond to abs to the effect of sealing the threads of a screw against a gravity leak no problem.

The fact that I am opinionated does not presuppose that I am wrong......

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Old 04-15-2014, 06:10 AM   #16
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I used J B Weld epoxy. Excellent results. Make sure you drain the tank and let it dry. Apply and let sit for 15 hours as the instruction say. Worked like a charm. Nothing like a water leak to frustrate the you know what out of someone, good luck.

Bill and Janice, We're lovin' it! (Airstreaming)


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Old 08-19-2014, 01:47 PM   #17
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I build green underwater fishing lights. Have for years. I use a two part M. grade epoxy and I've never had an issues. The stuff is bullet proof and once applied wont come off or leak. Just sand area to give epoxy something to grab onto clean and let it stand overnight. Im sure it will work. Let me know if you have any question as to where I got the stuff.

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Old 08-23-2014, 09:14 AM   #18
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Hi All, I worked in a rotomold plastic shop for four years. Polyethylene is a thermoplastic. The cross linked versions and nylons are not. So we repaired many, many leaky tanks by "welding" polyethylene to polyethylene at about 300 degrees. We had "wire feed" heat guns that would feed the poly into the heated area, similar to a hot melt glue gun. Otherwise finding a stick of polyethylene and using a hot heat gun, or soldering iron, you can melt the hole and feed in new poly. Let it form a glob and then sand it smooth when it cools.

Polyethylene tanks are very repairable. Like others have said, we did not find any adhesives that would hold on it. But we puddled polyethylene into some pretty big holes and then sanded with Scotchbrite disc so you couldn't tell it was repaired.

Practice on some scrap pieces first. It isn't hard. Even I can do it!


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