Leaking Concrete Water Tank

[passingas]

Has anyone ran across something paintable to coat the inside of a water tank to keep from leaking? I've tried water plug but couldn't fix the seepage part. It works on visible leaks, but not the seepage. Anyone else experience this? Thanks, pg

[canuckamuck]

What kind of water tank?

[passingas]

It's a five ring concrete tank like they build in place here. It worked great for 9 years, but now....not. It's used to store well and village water. pg

[worgeordie]

You need the paint they paint ponds with, painted my Koi pool 20 years

ago and still no problems, the paint I used was made by Jotun 

but it's not going to be easy painting the inside of the water tank,

maybe  you need to replace it with a stainless steel one.

 

regards worgeordie

[Anythingleft?]

There is a waterproofing mix you can find in the grout and tiling sections. Crocodile USA brand is one, around 10kg bags that you mix with water to make a slurry then paint on.
Should be easy to find as I have seen it in most of the large hardware outlets. It works well by the way.....

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[Anythingleft?]

Crocodile flex shield waterproofing cement

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[canuckamuck]

5 hours ago, passingas said:

It's a five ring concrete tank like they build in place here. It worked great for 9 years, but now....not. It's used to store well and village water. pg

Those concrete rings don't last forever. At first they are self sealing as the calcium in the concrete crystallizes in the small holes wherever there is a leak. But after 9 years they will have eroded quite a lot on the inside.

If possible, just knock it down and make another one.  I have lots concrete tanks none are leaking currently, but they do occasionally and then they reseal. Cheap to make.

[sometimewoodworker]

The materials under are easily available 

 

eithe will work

[sometimewoodworker]

The materials under are easily available 

 

Both  will work

[sometimewoodworker]

the website is so slow my post repeated 

 

 

Edited May 27, 2018 by sometimewoodworker

[canuckamuck]

Not all water proofing products are approved for drinking water however.

[KittenKong]

I would be inclined to use a butyl rubber liner rather than apply waterproofing products.

A liner should provide a total solution good for many years.

[sometimewoodworker]

Apparently neither of the duplicate posts has the pictures 

 

[NanLaew]

On 5/28/2018 at 5:12 AM, KittenKong said:

I would be inclined to use a butyl rubber liner rather than apply waterproofing products.

A liner should provide a total solution good for many years.

Got any specific brand recommendations for this butyl rubber?

 

Our dual concrete well pipe tanks are about about 12 years old and although the seepage isn't too bad, the covers went missing for a few years while we were in absentia and the water got badly contaminated so they had to be flushed and cleaned. Lately, the municipal water supply has been mucky as they install new city mains requiring me to install filters for the first time. Rather than get these old tanks drained and cleaned again, I reckon knocking them down and rebuild with new rings using this butyl rubber lining.

 

Thanks!

Edited June 11, 2018 by NanLaew

[KittenKong]

Not sure of particular brands. I would expect pool shops and places that do ponds and pumps would know about it.