Sealer for concrete – how to choose, what are the uses and how to use

Sealer for concrete is a material that protects concrete from the phenomenon of disintegration and from stains. The sealer blocks the pores of the concrete and thus prevents the penetration of water and salts or forms a sealed layer that prevents the passage of these substances. The sealer layer protects the concrete and prevents damage and adsorption of dirt due to rainwater, fats and various impurities.

Concrete is one of the most useful substances in the construction industry. Usually concrete consists of water, cement, and sand. Concrete holds well in conditions of pressure. However, its pores make it sensitive to wear and tear. Contaminants such as dirt and oil can affect the external appearance and structural integrity of the concrete. It is for this reason that it is very important to use waterproofing and protective materials that are suitable for concrete. No masonry in concrete does not end completely without a waterproofing layer.

Sealer for concrete – advantages

The sealer comes in different levels of shine from matte to ultra-glossy and adds the right touch to your concrete surface.
sealer for concrete blocks penetration of chemicals, dirt, mold, water, and UV rays.
The sealer reduces stale odors, crumbling, and cracking of the concrete.
With the sealer easier to clean the concrete, maintain it, and increase its durability over time.
The sealer can penetrate the concrete surface, strengthen the concrete, and protect it from pests, rust, and corrosion.
The strength of the sealer will not only protect the concrete but also beautify the concrete in a decorative way by “bouncing” the concrete shade.

Now that you know some of the advantages of the sealer for concrete, let’s talk about different types of sealers for waterproofing so that you can make the right choice. Remember, there is no concrete sealer that is suitable for all types of projects. In addition, check the product specifications and check the way of proper application. Proper implementation of the dealer is just as important as choosing the right type of dealer.

Acrylic sealer

Acrylic sealer is based on water or solvent (solvent) and it creates a strong top seal. The waterproofing material forms a protective layer on the surface. Acrylic sealer is produced for internal or external uses. However, acrylic sealer on a solid base is more ideal for outdoor use because it is more durable. Acrylic sealer is very popular because it contains a low level of V.O.C (Volatile Organic Compound), of toxicity, and of odor. Since the sealer for concrete is soft, it will need maintenance depending on its level of wear.

Polyurethane sealer

Polyurethane sealer is also available on the basis of water or solvent. This sealer is not as soft as the acrylic and it provides good protection against chemicals and abrasions. Polyurethane is suitable for both internal and external surfaces. These sealants usually contain about 60% -50% solids. Be careful and do not allow moisture to come into contact with the sealer layer until it completely evaporates.

Epoxy sealer

The epoxy sealer creates a long-lasting rigid finish. The more solids it contains, the stronger the finish will be. For example, a 100% epoxy finish is exceptionally stable and resistant to abrasion. Epoxy is usually recommended for indoor use because forgot its resistance to UV rays is not strong and can turn yellow in the sun. There is an epoxy that contains a little dark pigment that provides the sealer a semitransparent color. The epoxy sealer can be very slippery when wet.
If you are asking for a decorative result, it is recommended to read the instructions for the maintenance of the sealer for concrete. There are sealer layers that need to be exposed or rubbed before it will be possible to lay a new layer of sealant or paint.

Questions to ask before buying a sealer for concrete

If you ask for decorative care, is the sealer you choose suitable for this?
Does the sealer comply with regulations in everything related to the content of the V.O.C .
What conditions is the dealer about to be exposed to?
Is the sealer breathing?
What is the drying time of the sealer?


You should always try and test the dealer on a hidden corner to see if the result suits you. Before application, it is important to thoroughly clean the concrete surface, remember that it is necessary to wait close to three days until the layer dries. In general, it is recommended to work exactly according to the manufacturer’s instructions. In most sealer less, a two-layer smear is needed.

Leave a Comment