Sealing the pond with sealing slurry - this is how it works

A pond is the highlight of every garden. Whether as a bathing pond or for koi breeding, the most important thing is that it must be tight. Sealing slurry not only seals water tanks and wells, but also ponds made of concrete.

What is sealing slurry used for??

Sealing slurry seals all mineral substrates against moisture. You can apply them to concrete, formwork stone, clinker brick, sand-lime brick, aerated concrete, tiles, screed and many other materials.
In addition to being used in and around the house, they are also suitable for

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  • pool
  • Swimming pond
  • garden pond
  • Fountain
  • Cisterns

Sealing slurries with drinking water approval are not toxic and therefore do not harm plants and fish in the garden pond. If processed correctly, the shelf life is several decades.

What should be considered when sealing the pond?

If you want a waterproofing slurry to seal your pond, there are a few things to consider. For application, the sealing slurry needs a stable base made of concrete, if possible. A basin with a concrete foundation and steel reinforcement can best accommodate temperature differences of the different seasons. In this way you also avoid stress cracks or settlement cracks.

A flexible sealing slurry is best suited for this, as it bridges cracks. Start with the walls and finish with the floor. Apply two to three thin coats. Each of the layers must dry out according to the manufacturer's instructions, but at least one day.

Pipes and inlets can be sealed at the same time. PVC pipes should be sanded if possible so that the sealing slurry adheres to them. Avoid direct sunlight when drying; rain or frost can also damage the coating.

What does it cost to seal a pond??

Depending on the thickness of the order, you have to reckon with costs of 8 to 10 euros per square meter. That is a lot compared to the usual pond liner. You can be sure that your pond will last much longer and if cracks have formed, it can be drained and the cracks treated with sealing slurry.

Tips & Tricks Anyone who has an old septic tank can convert it into a cistern for watering the garden and discharge rainwater. The empty, dried-out pit is cleaned thoroughly, cracks and holes are closed and treated with sealing slurry. Beware of gases in the pit, this can be life-threatening!