How to Seal Leaks in a Concrete Pond

Written by ben wakeling
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How to Seal Leaks in a Concrete Pond
A concrete pond provides an elegant external feature to your garden. (Ryan McVay/Photodisc/Getty Images)

A concrete pond is an attractive garden feature, and provides a good talking point when you have guests. However, if the tank has not been properly sealed, there is a risk it could leak, causing costly damage. The easiest way to avoid or repair a leaking concrete tank is to apply a few layers of concrete sealant to the interior of your pond. This is a relatively straightforward process, carried out using products and tools available at many hardware stores.

Skill level:

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Things you need

  • White wine vinegar
  • Mop
  • Water
  • Hose
  • Concrete sealant
  • Paintbrush
  • Rubber gloves
  • Face mask
  • Vacuum cleaner

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  1. 1

    Drain the pond of all water, and leave it to dry for 12 hours.

  2. 2

    Remove any dirt and debris using a vacuum cleaner.

  3. 3

    Mix 10 gallons of water with 1 quart of white wine vinegar, and use this to clean the sides and bottom of the pool using a mop.

  4. 4

    Use a hose to rinse the concrete, and leave it to dry for another 12 hours.

  5. 5

    Use a paintbrush to evenly spread a thin layer of sealant over the concrete. Be sure to wear gloves and a face mask when doing so, as sealant fumes can be dangerous and the chemical is an irritant when it comes into contact with skin.

  6. 6

    Wait until the layer of sealant has dried, and then apply another coat. Repeat this step once more until you have three coats of sealant on the concrete.

  7. 7

    Refill the pond, and return any plants or fish to it.

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