Coat concrete


Concrete is a versatile building material. This increases the requirements for later processing. For many applications it is important or at least useful to coat concrete. When to coat concrete and what to pay attention to, below.

Concrete is extremely versatile

Concrete is a building material that is appreciated by industry, crafts, DIY and hobbyists alike. Depending on what the artificial stone is used for, different types of concrete can be mixed. But mostly or primarily the compressive strength is adjusted. In addition, the properties also depend on the post-treatment of the concrete.

When concrete should be coated

For example, under "Destroying Concrete", you can find out what makes concrete chemically lastingly damaged. To prevent this destruction, at least with lengthening effect, you can coat the concrete. But also a number of further processing steps such as plastering concrete make a coating necessary or at least useful.

Among other things, it is important or advisable to coat concrete according to the following circumstances:

  • as floor in garages, cellars, workshops etc.
  • as a wall that could pull water out of the ground
  • filled with water or regularly in contact with water
  • Concrete parts, can be found in the transport sector
  • generally as protection against salts, chemicals etc.
  • generally with otherwise increased mechanical abrasion
  • before further processing with other building materials (plaster, paint, wallpaper, etc.)

Types of concrete coating

Accordingly, you can also make distinctions in the case of concrete coatings. Either you must use products that prepare or protect the concrete. Therefore you can coat concrete with the following means:

  • Primers and adhesive bridges
  • impregnation
  • sealers

Coatings to protect the concrete

In the ordinary, everyday environment, it is water and salts that come first when concrete is damaged. As already mentioned, water damage occurs on concrete parts that are in the water or regularly come in contact with it.

Protect against invading water

These are walls that can draw moisture from the ground, flower pots or concrete tanks as a water reservoir. The water can penetrate into the concrete. In the winter outdoors, the resulting ice in the concrete blows up the artificial stone, in addition it makes concrete fundamentally more porous and thus more susceptible. In particular, metallic reinforcements are then endangered.

Salt - the biggest enemy of cement

Salts endanger concrete especially where vehicles are moved and road salt is generally used, ie driveways, garages, footpaths that are scattered, etc. In garages and driveways, road salt is introduced by melting and sprayed water and slush adhering to the vehicle. If the salt residues penetrate into the concrete, destroy the cement.

Chemicals and mechanical abrasion

In workshops, there is a risk above all when chemicals are used, but as in basements, mechanical abrasion can clog the concrete. For all these uses, you must use specially adapted impregnations and sealants. In garages, these may not additionally react with the plasticizers of tires (mainly plastic coatings are used).

Do not neglect security aspects

In workshops and cellars, slip resistance is also an important factor. Many sealants can also be mixed with colors. While sealants surround the concrete, impregnations penetrate into the pores of the concrete and close it. You can read both applications under "Concrete sealing" or "Concrete impregnating".

Coating for further processing on concrete

Basically, concrete does not have very many pores and is therefore considered to be slightly absorbent. Depending on the mixture formulation, processing and after-treatment concrete can be compressed even more. As a result, the porosity is then significantly reduced again. This means that many building materials that are to be applied to concrete may not be able to adhere enough. This can be valid, among other things, for the following prerequisites:

  • Plaster concrete
  • Paint or varnish concrete
  • Fill concrete
  • Dressing concrete with tiles
  • Paper concrete directly
Coat concrete with primers and adhesive bridges

In order to produce sufficient adhesion, it is advisable in most cases to prepare the concrete with a corresponding deep-adhesion base. This penetrates deep into the concrete and gets stuck with the artificial stone as much as possible. However, it is important in the use of adhesive bridges and primers as coatings that they are suitable on the one hand for concrete. On the other hand, but also with the subsequent products that are still to be applied, are compatible.

Tips & Tricks

In addition to coating for a variety of reasons, the bonding of concrete is very important. With many chemical adhesives, you can not only bond concrete with concrete and other materials. Many adhesives can also be used for sealing and coating.


Video Board: How To Skim Coat A Concrete Patio - Pour Concrete Surface