Pond Sealant

Soilfloc® Sealant is the best polymer based sealant available for your canal, irrigation ditch or watering hole. Specifically designed to find leaks, whether in the floor, the wall or through rock formations and seal them. Soilfloc® custom blends linear and cross-linked polymers to seal any type of soil, for any sized project.

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How do I seal my leaking pond?

My place of employment is located about 25 miles west of Chicago. There was a pond onsight but it was lost during construction on the tollway that runs right by it. We have since reconstructed the pond but it has lost its natural seal. The pond holds water, about 5 feet worth, but the pond has the capacity to hold about 10-12 feet of water. I have seen it this full around the middle of may when there was heavy rainfall. Do you have any suggestions as to how to seal the sides of the pond ( I believe this to be the main reason)? I know of Bentonite and consider this an option, but I was wondering if you had any other suggestions. Please let me know.

asked by anonymous
reshown by TPR

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Hello Jason, While we try and design and build our ponds to never leak by doing proper soil testing before we start digging with the shovels the reality is that certain conditions can cause a pond to leak. We don't specialize in repairing a leaking pond as that often involves fixing someone else's shoddy pond building or poor choice for a pond site. That being said, whenever we work with a contractor to seal a pond we almost always use Soilfloc pond sealer.

Soilfloc® shoud be applied when the ditch, pond, or canal has water in it & is currently leaking as the leak in the dam or basin creates a natural suction that will draw the Solifloc polymers into the problem areas & seal the leak or leaks.

If you know where the leak is can concentrate the application in that area, but it is strongly recommended that the rest pond, canal or basin be treated as well to provide a consistant seal. This also helps if soil consistancy could lead to future leaks. Application is best done when the pondwater level is at least above the problem area and to the full basin volume of possible. Read more about Soilfloc Pond Sealer


Another product used is bentonite. Bentonite is amazing stuff and it is actually the same stuff that is in clumping kitty litter! I should know because I have friends who use raw bentonite mixed with sand as an inexpensive cat litter! Bentonite, or sodium bentonite clay as it is also known, swells up to eighteen times its dry size when it becomes wet. Expanded bentonite forms an impermeable gel seal which makes an excellent pond sealant. Bentonite is environmentally safe and does not affect the water, livestock, or wildlife. When properly applied, it will not harm fish. For these qualities, bentonite also makes an excellent liner for new pond construction. When sealing a leaking pond to prevent water loss through seepage, sodium bentonite can be applied directly to the soil in the pond bottom or it can be sprinkled on the surface of the water and allowed to settle to the bottom. There are three basic methods: the blanket method, the mixed blanket method and the sprinkle method. Sodium bentonite is easily applied. In the case of small ponds, it can be applied with simple hand tools and for larger ponds, with ordinary farm equipment.
J. P. Self and Associates only sells granular bentonite by the tractor trailer load, 45,000 lbs. minimum,unless local pick-up.

I've heard of using Sodium Bentonite or a product called ESS-13. Check out http://www.pondsealer.net/ for the bentonite and Seepage Control http://www.seepagecontrol.com/ for the ESS-13 product. Depending on the size of the pond a liner may be the best option but you can try the three sites I suggested.

Soilfloc pond sealant  is available here

answered by TPR
edited by TPR

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