sealing leaks in holding tanks

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leslie lloyd

I have been reading about the new epoxy G?flex,just wondering if anyone has rebuilt a holding tank using it.There claims are that the tensial strength is the as well as the ability to work with it over a reasonable time set?
 
L

leslie lloyd

I have been reading about the new epoxy G?flex,just wondering if anyone has rebuilt a holding tank using it.There claims are that the tensial strength is the as well as the ability to work with it over a reasonable time set?
 
Dec 2, 1997
8,926
- - LIttle Rock
What's the tank made of--metal, plastic or FG?

If it's metal, you might as well just build a new tank, 'cuz the first leak(s) in any metal waste tank is/are always only the FIRST leaks as urine continues to eat through the metal..first in welds at seams and fittings, then the sheet metal...eventually turning the tank into a colander. If the tank is plastic, nothing yet exists that bonds to polyethylene permanently, so at best you'd only be staving off the inevitable for a year or two, likely less time than that. Heat welding--IF you know how to do it correctly--can mend some cracks in some locations, but not all. But if the tank is fiberglass, you can prob'ly repair it with any good epoxy. Tensile strength isn't really an issue, though...'cuz tank walls should be thick enough to support the weight of the contents without flexing or bulging. Bottom line: If your tank has failed, I think most people will agree that replacement instead of repair is the only good option no matter what it's made of, and will most likely be the least expensive solution.
 
Dec 2, 1997
8,926
- - LIttle Rock
What's the tank made of--metal, plastic or FG?

If it's metal, you might as well just build a new tank, 'cuz the first leak(s) in any metal waste tank is/are always only the FIRST leaks as urine continues to eat through the metal..first in welds at seams and fittings, then the sheet metal...eventually turning the tank into a colander. If the tank is plastic, nothing yet exists that bonds to polyethylene permanently, so at best you'd only be staving off the inevitable for a year or two, likely less time than that. Heat welding--IF you know how to do it correctly--can mend some cracks in some locations, but not all. But if the tank is fiberglass, you can prob'ly repair it with any good epoxy. Tensile strength isn't really an issue, though...'cuz tank walls should be thick enough to support the weight of the contents without flexing or bulging. Bottom line: If your tank has failed, I think most people will agree that replacement instead of repair is the only good option no matter what it's made of, and will most likely be the least expensive solution.
 
L

leslie lloyd

tank within tank

The tank is alumn,but my thoughts are too build a plastic or fiberglass tank in side of it using the old tank as a form for the new.This new epoxy sounds hot,with the old tank to bolt too the seams would be the only places too epoxy.The work involved in removing the old tank would make it a bear of a job.A thought on the qualaties of this new product.Thanks for the response,got your book for Christmas,old one I think,would like lastest,and know where to buy it.Thanks again
 
L

leslie lloyd

tank within tank

The tank is alumn,but my thoughts are too build a plastic or fiberglass tank in side of it using the old tank as a form for the new.This new epoxy sounds hot,with the old tank to bolt too the seams would be the only places too epoxy.The work involved in removing the old tank would make it a bear of a job.A thought on the qualaties of this new product.Thanks for the response,got your book for Christmas,old one I think,would like lastest,and know where to buy it.Thanks again
 
Sep 25, 2008
7,371
Alden 50 Sarasota, Florida
tensile strength might be an issue

If I understand correctly, you hope to line the existing tank. That might be an adventure trying to clean the old one to sufficiently remove crud from the sides and bottom such that any epoxy could bond to it which, as Peggy said, is at best a short-term fix as it will never hold. Similarly, glass work on top of crud will quickly crack. If you have access to clean it properly, why would you not simply replace it? Frankly, this isn't a repair you'd want to do often or even infrequently and given the cost of a new tank, it seems like an easy decision.
 
Sep 25, 2008
7,371
Alden 50 Sarasota, Florida
tensile strength might be an issue

If I understand correctly, you hope to line the existing tank. That might be an adventure trying to clean the old one to sufficiently remove crud from the sides and bottom such that any epoxy could bond to it which, as Peggy said, is at best a short-term fix as it will never hold. Similarly, glass work on top of crud will quickly crack. If you have access to clean it properly, why would you not simply replace it? Frankly, this isn't a repair you'd want to do often or even infrequently and given the cost of a new tank, it seems like an easy decision.
 
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