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The natural stone waterproofing against dirt and weather

A natural stone waterproofing from nanoCare keeps the surface fresh and clean for longer. The stone retains its natural colour without affecting the structure and breathing properties of stone, marble and granite tiles. The treatment is suitable for the preventive and refreshing care of all types of natural stone.

It provides protection on almost all types of stone, such as marble, sandstone, granite, slate and porcelain stoneware and is even suitable for paving stones. In outdoor areas or in the house, on worktops, floors and stairs, waterproofing natural stone conjures up a new shine and brilliance.


The Natural stone waterproofing: this is what it does

Natural stones such as granite and slate are extremely popular for use in the home and garden. Untreated, they are very sensitive as work surfaces or floor coverings. If its surface is completely sealed, e.g. with a paint coat, the natural stone loses its valuable and attractive properties. The waterproofing of natural stone is a successful compromise in order to improve the resistance, make the stone easier to care for and at the same time preserve its natural beauty

  • reduction of staining
  • Easy care
  • colour intensifying properties
  • Protection against soiling and weathering
  • Food safe protective waterproofing for the kitchen

How does waterproofing protect the natural stone?

Waterproofed porcelain stoneware and natural stone does much more than just protect against dirt and contamination. The waterproofing stone is given new properties that make its care and use even easier, safer and more pleasant. 
Natural stone waterproofing is long-lasting and protects against UV light and weathering. Anti-slip waterproofing preserves the shine and improves the slip resistance at the same time

  • Salt and road salt resistant
  • breathable
  • UV-resistant
  • Protection against weathering
  • dirt-repellent
  • moisture repellent
  • anti-slip treatment

What is the difference between coating and waterproofing ?

The natural stone is not completely sealed during waterproofing. In simple terms, this is a partial closure of the stone to weaken its sensitive surface properties. With sealing, however, the surface of the stone is completely closed. This full closure corresponds to a lacquering of the natural stone.

Advantages and disadvantages of waterproofing natural stones

The natural stone gives up and releases moisture via its porous surface. This is one of the most pleasant properties of natural stone in interiors, because the natural moisture management of the stone supports the room climate. The natural stone retains these important and sought-after properties after its treatment. However, they are lost when the stone is completely sealed. Waterproofing does not have many other advantages over complete sealing


  • Dirt adheres less easily
  • Less effort in maintenance care
  • No smooth surface with increased risk of slipping
  • Moisture and wetness partially pearl off
  • Moisture penetrates more slowly
  • In contrast to sealing, the pores remain open for diffusion
  • Colour particles can deepen texture and colour tones



  • Complete wetness protection is not possible
  • Little protection against mechanical scratches or dullness
  • Natural stone is still acid-sensitive after waterproofing

Correct waterproofing of tiles made of granite, slate and other types of stone?

A thoroughly water-cleaned and completely dry floor covering (residual moisture less than 3 percent) is receptive to the application of the impregnating liquid. In most cases, the solution is applied evenly to the natural stone or porcelain stoneware using a roller, cloth or brush. It is applied diagonally to the laying pattern. Stone is treated at a normal temperature between +10 and +25 degrees Celsius. Surplus is removed directly, but at the latest after half an hour of exposure time. 

All in all, waterproofing should take effect for about 15 minutes. Afterwards, it is wiped off with a cloth or mop. Strips or drops on the treated surface are rubbed in. Product residues that become visible on the surface should not dry on. After a drying time of 48 hours, the treated surface can usually be walked on or used.
Until it is completely dry, the stone surface should not come into contact with water, oil or grease.

Important: Moisture in the stone can lead to discolouration during waterproofing. Natural stones should only be cleaned and waterproofed when well dried.

Natural stones with different absorption behaviour

The effectiveness of waterproofing natural stone depends on many factors, including the type of natural stone. For particularly absorbent types of stone, such as marble, the effect of waterproofing is less than for less absorbent types of stone, such as granite and slate. A complete sealing of the pores results in a sealing of the stone.


A high absorbency, with slightly lower efficiency are:

  •     Marble
  •     Sandstone
  •     Limestone
  •     Clay slate
  •     Travertine


Less absorbent hard stones include:

  •     Granite
  •     Slate 
  •     Basalt
  •     Quartzite
  •     Gneiss

When treating natural stone, the agent used is matched to the type of stone and worked in. A treatment can be carried out specifically against water, fat and oil. Food-safe products are used when processing kitchen worktops.

How often must the natural stone be waterproofed?

Depending on the absorbency of the type of stone, the intensity of use and the weather conditions, natural stone may need to be treated more frequently outdoors, such as on a terrace, than in a protected interior. It is advisable to repeat the waterproofing approximately every two to five years. In interior areas subject to heavy use, such as the kitchen, the bathroom or the entrance, the natural stone waterproofing should be refreshed every two to three years.


Cleaning and maintenance of natural stone tiles

A floor of natural stone is noble and contemporary. The natural material is also durable and easy to clean. Terracotta, cotto, marble, granite, slate or limestone and sandstone are often used as natural stone flooring indoors and outdoors. Porcelain stoneware has similar robust properties to natural stone. Despite all its advantageous properties, the correct care must be taken


Tips for the cleaning and maintenance of natural stone tiles and coverings

Easy displacement of bio films​​​​​ Each stone has its own special features. Care instructions are included with the purchase

Easy displacement of bio filmsProtection and care begin with the careful laying of the flooring

Easy displacement of bio filmsCoarse splinters and residues must be thoroughly removed with the final cleaning.

Easy displacement of bio filmsProfessional waterproofing for easy maintenance care

Natural stone care - what should be avoided?

The special finish of the waterproofing protects the natural stone against oil, grease, dirt and water. Dirt hardly adheres to the waterproofing surface. The stone is particularly easy to wipe and a normal wipe care is sufficient. As on untreated stone, acidic substances such as vinegar cleaners should be avoided - because in any case they do more damage to the surface than they help. Cleaning with high-pressure cleaners or sharp objects also damages the stone.

Care of porcelain stoneware tiles - what is important?

Waterproofing porcelain stoneware tiles are an easy-care, hard-wearing and hard-wearing floor covering. As high-quality ceramics, they already have a high mechanical resistance "by nature" and are particularly resistant to alkalis and acids. Waterproofing is particularly advantageous in areas susceptible to dirt, with single-coloured, very light or very dark porcelain stoneware. The protective impregnation makes the tile even easier to clean, while retaining its colour and surface.

Fine dirt, such as dust and hair, is easily removed with a damp microfibre cloth or microfibre mop. In any case, on both impregnated and non-impregnated tiles, re-greasing, soap-based and wax-based cleaners should be avoided. Such cleaning agents can impair the slip resistance and lay layers over the tiles, which has a negative effect on the appearance



Ideally, natural stone should be waterproofed after laying. If natural stone tiles or natural stone slabs are grouted, it is recommended to treat them before grouting.

The waterproofing is done with a soaking treatment. This involves solid but porous materials, such as stone, wood, concrete, paper and textiles. Dissolved, emulsified or dispersed substances are used. These waterproofing agents give the treated surfaces new usage properties after they have evaporated or dried.

If you are quick enough and wipe up all stains immediately, you will also have a long lasting pleasure with the untreated floor. Every stone is porous, some types of stone such as marble, sandstone and limestone more than others. As a result, even liquid substances penetrate unhindered and can hardly be removed after the stain has formed Natural stone becomes more robust with waterproofing Natural stone becomes more robust with waterproofing. It no longer absorbs the liquids completely and is much easier to clean. After treatment, neither the orange juice spilt in the kitchen nor the dripping fat from barbecuing on the terrace will cause permanent damage.

A natural stone waterproofing is possible without any problems and without any restrictions in the case of underfloor heating. The natural stones retain their very good thermal conductivity.

In the building industry, the building materials used must first and foremost be protected against water. They must not absorb liquids, as this has a negative effect on the building fabric and the quality of living. This hydrophobicity, the "making water-repellent", is largely equivalent to waterproofing. Wood is protected against water and environmental influences by dipping, spraying or a pressure waterproofing

Did you already know ...?

... that even the Egyptian pyramids, whose façade was once made of sandstone, as well as many other places of interest have been provided with a natural stone waterproofing? To prevent the monuments, some of which have been standing in harsh climatic conditions for thousands of years, from further decay, many of them have already been protected with waterproofing. This is invisible and is not noticed by the visitor. Waterproofing natural stones are also quite common in historical buildings. In some cases, entire surfaces are completely sealed.

Large churches, tiled floors of palaces and other historical buildings are often fitted with floors made of granite, marble or porcelain stoneware. To ensure that old and very beautiful floors can permanently withstand the rush of visitors, they are waterproofed or - as in the case of the particularly porous sandstone - sealed. The waterproofing of the floors, which are often polished to a high gloss, also increases their slip resistance.