Waterproofing Fish Ponds, Fountains With Liquid Roof

Liquid roof or Liquid rubber, being liquid EPDM, has a wide range of application areas due to its extensive features. Its reflective nature results in delivering cooling effect. It is UV and ozone layer stable, highly chemical resistant, can tolerate a very broad temperature range and is compatible with a variety of surfaces like rubber, fiberglass, concrete, metal, foam, wood and fabric. It is the best solution for roof leaks repair. But besides all these features, one characteristic of epdm that is very important and must be mentioned is its water proofing nature. Due to this, it is extensively used to waterproof fountains and fish ponds.

The fountains and fish ponds have concrete surfaces. When special additives for water resistance are not added to a concrete surface, a need for an impervious coating becomes very essential. Because if such a coating is not applied, then it may lead to leaching out of soluble constituents and this is something very dangerous. These factors demand that the ponds and fountains must be glazed with a coating that is nontoxic and safe for the fishes and offers maximum water resistance. Liquid EPDM rubber, no doubt is the best. It provides protection to the surface both against the fresh and salt water.

Besides providing the water proofing feature, it also provides a solution to the roof leaks problem. The pond surface is usually plastic, concrete or rubber lined. When leaks are encountered in concrete surfaces, rubber liners are usually installed. But this process is very tricky and complicated. Also plastic pond liners generally get cracked. They can be repaired with products like caulks and tapes but they eventually get wear out. So for fixing leaks on both plastic and concrete surfaces, liquid roof is the most recommended product. It is both long lasting and easy to install.

Surface preparation for application of liquid roof to ponds and fountains etc should be done carefully. The surface should be cleaned properly before application. If an alga is present treat with an algaecide or 25% solution of bleach, let stand for one hour and rise well. In fish ponds polishing the surface with a wire brush or a high pressure water spray might be needed. A rain free one week is needed for the surface to dry out.



  1. This is a top blog over here. I think I’ll visit your website more if you post more of this kind of specific information. Many thanks for posting this information.

  2. Very nice article, just what I was looking for.

  3. Hi very good blog, I just inspecting the internet to learn an inspiration or an exciting topic. Nice blog, be grateful for sharing.

  4. Just exactly what I was looking for.!
    Thank you

    Can one color white to say blue?

    1. Thanks you can custom color by adding no more than three ounces per gallon of an universal colorant (Glycol Colorant for light colors and for medium to heavy colors use a solvent based colorant available at most paint stores). If the desired color is still not achieved you may add up to ONE more additional ounce of colorant. Once the colorant is added and color achieved then you add catalyst and mix and you are ready

  5. I’m about to try this way out. I don’t know what I was thinking, but I jumped in head first. I made a pond and fountain out of concrete. I don’t know why I wasn’t thinking about it being porous. So I need to completely drain the pond, clean it of all algae, let it dry. Once it’s dry, I add the rubber, then let that dry? Is there any other tips or tricks I should be aware of? I’m so sorry this is my very first time and I don’t know what I’m doing.

    1. Brandy if it is porous you will need to trowel the surface first and let that dry before applying the product it would be very difficult to get our product into all the small holes. you do need to completely dry the pond and clean it from any surface dirt or any material the product would come into contact with. if you need more help give our office a call thank you

  6. Does the rubber roofing sealant have any ill effects on fish? I know some things people might use on a water feature do

    1. I would suggest using our version that is safe for fish pondpro2000.com

      Thank you

Leave a Reply

Your email address will not be published. Required fields are marked *