Sealing the sink - you should know that


Rinses must be installed tightly. Find out which seals are required, how to check them and when to repair them in this post. In addition, which sealing materials are suitable.

Necessity of sealing

A sink must be installed tightly. Otherwise, water and moisture from the worktop can enter under the sink, drip and cause moisture damage. In addition, the wood of the worktop is permanently softened at this point, which in the long term can also lead to damage.

Existing seals

For a new kitchen sink, sealing cords or sealing tapes are usually supplied for installation. Some rinses are putty-like masses. These seals must be placed so that they do not protrude below the sink after installation. Otherwise you will not fulfill your sealing effect properly.

Check the tightness

Carefully wipe the sink dry. Now feel at the edge of the sink, exactly at the edge of the installation, whether it has retained moisture. Also take a look below the coil and feel along the mounting rim. If you feel moisture anywhere, you should renew or at least improve the seal.

Suitable sealing materials for the sink

Sealing materials for such cut-outs must meet a number of criteria:

  • they should be dense and permanent
  • Moisture must not crawl underneath
  • they have to be heat resistant
  • they have to be elastic

Silicone and acrylic sometimes have the problem that moisture can creep underneath. In addition, the later removal of the sink is probably possible only by force. The same applies to sealing assembly adhesive.

A waterproof layer can also be made with white glue and even with paint. However, it is important that the material forms a fairly elastic layer and is heat-resistant. About white glue and paint must in any case still a foam rubber seal or similar sealing material.

Tips & Tricks

If you ask in the department, you will probably get a lot of recommendations. If you follow the sink manufacturer's instructions, you will always be on the safe side if there are problems later on. Also, before applying a new sealant, always thoroughly remove the remainder of the old sealant and apply the new sealant to the edge of the sink.


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