Waterproofing concrete pond

[GBBUDD]

Two part epoxies are great. however they are paints . a covering. A PENITRATING SEALER IS BETTER IN MY OPION. how ever i have not used an epoxy paint on the inside of a pond . check the material data sheet for the product . like the one someone posted they had 4 , 8 , and unknown years of durability i'd want a minimum of quadruple 8 years. rapid sets and plasters will achieve that . i'd bet there are epoxies that will as well it's just how much youll spend for it , a bag of rapid set just guessing at max is probably 12 bucks plaster probably double for the same coverage in epoxy i'd guess would be minimum of 75 bucks

 

[Chelsy Williams]

Two part epoxies are great. however they are paints . a covering. A PENITRATING SEALER IS BETTER IN MY OPION. how ever i have not used an epoxy paint on the inside of a pond . check the material data sheet for the product . like the one someone posted they had 4 , 8 , and unknown years of durability i'd want a minimum of quadruple 8 years. rapid sets and plasters will achieve that . i'd bet there are epoxies that will as well it's just how much youll spend for it , a bag of rapid set just guessing at max is probably 12 bucks plaster probably double for the same coverage in epoxy i'd guess would be minimum of 75 bucks

I appreciate the info. We used Pond Armour on our old 100+year old cement pond and it served us really well but starting from scratch soon so just trying to figure out the best route. Thanks again!

 

[PNDFARY]

Hands down fiberglass but at 3 feet wide thats not much of a viable option . Plaster is a possibility. If you had asked before you built I could have recommended a mix that is water proof on its own. There are also many products out there that are basicly a paint that can do the job.

Not sure how comfortable I'd be with your floor patch on the bottom toward the upper left side. if theres a hard dark line there could be the potential of a leak as it looks in the photo. I'd get that patched a bit better before waterproofing

I am just starting to build my concrete pond, and saw your post. What do you recommend for concrete that is also fish-friendly? I have been pondering what to put over the concrete so the fish aren’t affected by toxins in the concrete.

 

[j.w]

@PNDFARY

 

[GBBUDD]

I am just starting to build my concrete pond, and saw your post. What do you recommend for concrete that is also fish-friendly? I have been pondering what to put over the concrete so the fish aren’t affected by toxins in the concrete.

NOTHING , the concrete will only leach for a week or two, so though it may seem a bit much, after two weeks do a full water change and your off and running. After that it helps actually buffering your kh .

I should add it also depends on the quality of the concrete not all concrete is water proof actually most is not I believe 5000 psi is where it begins on average. but if i had my choice i would go with the tried and true proven method over the decades of a scratch coat of plaster over the concrete

 

[PNDFARY]

NOTHING , the concrete will only leach for a week or two, so though it may seem a bit much, after two weeks do a full water change and your off and running. After that it helps actually buffering your kh .

I should add it also depends on the quality of the concrete not all concrete is water proof actually most is not I believe 5000 psi is where it begins on average. but if i had my choice i would go with the tried and true proven method over the decades of a scratch coat of plaster over the concrete

Thank you. I was very much leaning toward plaster. Do you suppose I’ll need a special plaster to be non toxic? I’m about to do some research on that, too.

 

[GBBUDD]

Same scenario, place it, soak it, water change after a couple weeks and your golden. i would look into coloring the plaster white is not my first choice for gleaming back at me. it will age and bio film but id rather see a tan or gray.