Liquid Rubber For Ponds and Plywood Application

Liquid Rubber Fix pond leaks. Waterproofing Fish Pond, Leaks Repair, pond liner, Fountains, & Reflecting Pools with Liquid EPDM Rubber Concrete which has not been modified with special additives must be protected by an impervious coatings when used for containing water. Unprotected concrete will absorb water which can then leach out soluble constituents and cause spalling when frozen. The combination of outdoor exposure plus water immersion creates a demanding environment for a coating. It must have high resistance to water penetration, be flexible enough to withstand extremes in temperature, and not be affected by ultra violet radiation from the sun. Liquid EPDM rubber coatings possess all this characteristics and are also non toxic to fish.

Liquid Rubber for Residential and Commercial Roofs
Liquid Rubber Sealant Coating

Preparation. Drain water and clean surface dirt while concrete is still wet. High pressure water spray and/or scouring surface with a wire brush may be necessary in fish ponds. If algae is present treat with an algaecide or 25% solution of bleach, let stand for one hour and rise well. Allow one week (rain free) for concrete to dry out.

If you are using this in Koi tanks in immersion conditions, make sure you have 2 coats of Liquid EPDM and that you have a full cure. To do so, let cure in air (without water) for about 1 week in 70 deg F or more ). Soak and rinse out the tank several times with water before making this ready for the Koi. The soaking and rinsing is to ensure you get out any residue solvents after the curing process. You will of course need to prepare the water for the Koy in whatever normal way you prepare Koi tanks/ponds.

Whether your pond is concrete, plastic or rubber lined. EPDM Liquid Rubber can fix your leaks troubles. Plastic pond liners have a tendency to crack or to tear. There are products such at tapes and caulks that will eventually wear. EPDM Liquid Rubber, on the will not. For concrete ponds the easiest solution for leaks are to cover them with a rubber liner but they are tricky to install. Liquid Rubber Coatings provides an easy one-time solution to your pond leak regardless of if they are made of rubber, concrete or plastic. And yes, it is safe for fish!

Liquid Rubber for Coating Plywood:

Liquid Rubber Coatings has been used directly over plywood to make a finished roof in situations where expediency and minimal cost were the primary considerations. Although this procedure results in a weaker roof structure, water-tightness can be achieved if the application is performed carefully. The joint between sheets should be positioned directly over a roof truss and securely fastened to prevent warping. Next, to seal the pores, coat plywood with an oil based primer. Allow an overnight cure. Seal the joint by bridging it with a 6″ wide polyester fabric strip. Apply a light coat of EPDM rubber over the joint, lay fabric into wet rubber and smooth out wrinkles. Complete job by applying a liberal coat of Liquid Rubber over entire roof surface, being especially careful to completely cover the fabric over the joint without skips or pinholes. Using an oil base primer on the wood considerably improves the appearance of a one-coat application of Liquid Rubber.

Liquid Rubber is excellent for Wood Surfaces Repair Product; Liquid Rubber can be applied to wood. We recommend first applying a primer coat using an oil base primer and then the Liquid Rubber after the primer has dried. Liquid Rubber can be colored using “universal” colorants available at any paint store. You can add up to one cup per gallon of paint thinner for easier handling when going over wood. Liquid Rubber is slippery when there is only a fine mist of water on its surface. Silicone and oil-based materials are considered unstable and should be avoided.


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  5. How do i get this product

    1. Hi Mike you can call our office directly monday at 610-298-1989 Thank you

    2. you can call our office at 610-298-1989 or order directly on line we don’t retail the product in stores
      Thank you

  6. I need for a fountain

  7. Can you coat the inside of a wooden hot tub?

  8. Do I need to use a primer on a very porous concrete pond with liquid rubber?

    1. Hello yes that is correct the primer would be needed first thank you

    2. Yes that is correct. or better yet just go with the pondpro Concrete product found at

      Thank you

  9. The following two statements from your post seem contradictory. Can you please clarify?

    “We recommend first applying a primer coat using an oil base primer and then…”

    “Silicone and oil-based materials are considered unstable and should be avoided.”

    1. Here are the conditions the proflex primer should be used
      Thank you

      Built up asphalt roofs-You would first need to apply the ProFlex Primer before applying the liquid EPDM.
      Modified asphalt roll roofing – First needing the ProFlex Primer
      Stainless steel-Only if sanded
      Neither the primer or Liquid EPDM can be applied to glass
      Silicone caulk-Any silicone caulk needs to be removed and replaced with either butyl or acrylic caulk
      Wood applications; however these are not warrantied as we cannot verify the condition or quality of the wood
      Concrete where there is little foot traffic (concrete applications require one coat of the ProFlex Primer)
      Any roof where a 3rd party coating such as an elastomeric or acrylic was previous applied
      Motorhomes or RV’s made by Fleetwood
      Urethane foam will require the Proflex Primer Version
      Torch down roofs
      Note any usage for non-roofing applications voids warranty
      Applications of the proflex primer over water based acrylic elastomerics are not covered under warranty
      OSB; however these are not warrantied as we cannot verify the condition or quality of the wood
      TPO-Must be aged 5 years. Adhesion test required
      The manufacturer offers a 5 year warranty when liquid roof is used in conjunction with Proflex primer
      Any other application must be approved in writing

    2. oil based meaning oil based roof coatings. as far as preparing the wood a oil based primer and the proflex primer is the best combination and then the liquid epdm

      1. we are trying to put a membrane seal using Liquid Rubber on a covered porch where there is no subfloor underneath into the basement. The wood is not tongue and groove. We do not know if the paint on the porch is currently oil based. Based on this post, which is contrary to the details of the actual product itself (which says it cannot be used on wood with an oil based paint), I do not understand why you’re recommending an oill based primer on wood first. Please reply. Thanks

        1. you can give our office a call at 610-298-1989 ext 1 for tech support thank you

  10. I have a molded pond and have patched a crack in it with a patch. Well here I am, the patch leaked. Will your product work on my pond to make it waterproof?

    1. better to use our thank you

  11. I have a preformed fish pond with a rubber liner. There is a small leak somewhere about 6″ from the top. May I use Liquid Rubber Neopond sealant to correct this situation?

    1. Yes you can but better with our pondpro 2000 you can visit our site here

      thank you

    2. i would suggest our for any pond application
      thank you

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