Repairing holes and cracks in cement/concrete floors

You can easily repair concrete with epoxy yourself. Concrete floors can be damaged, which can make it difficult to apply an epoxy coating or cast floor or will not produce the desired effect. Consider, for example, pits, holes and cracks in the concrete floor or (shrinkage) cracks in a cement screed floor. (Floating) anhydrite floors can also sometimes be cracked, making repairs necessary before a floor can be installed. In this article you can read how you can easily repair holes and cracks in your cement or concrete floor with epoxy and Stewathix.

Repair pits, holes and cracks in concrete and anhydrite floors

Depending on the extent of the damage, you will need different products. For large cracks you will need 2-component epoxy mortar for the concrete repair.  

Concrete repair of small cracks with epoxy:

Concrete repair of large/many cracks with epoxy:

Step 1. Applying an epoxy primer for concrete

To repair defects in concrete with epoxy, you must first apply an epoxy primer (for dry surfaces). This improves adhesion and ensures that the repair can be carried out properly. Mix a small amount of epoxy with hardener on a scale and apply it to the crack, hole or damage. Allow the primer to cure for a minimum of 10 hours and complete the entire repair within 48 hours of applying the primer.

Step 2. Filling the crack with an epoxy paste

Mix another amount of epoxy with hardener and mix in a filler. Stewathix can be used for small cracks and damage (up to approx. 10-15 cm). This produces a smooth paste that can be used to patch holes, fill cracks (using a putty knife) and fill damage or holes. For larger concrete repairs you need two components. Larger holes can be filled with a mixture of epoxy and dry sand. A repair mortar can be mixed with this.

Step 3. Smooth the floor

After applying the epoxy paste or repair mortar, smooth the floor neatly. Large holes can be filled in 2 times if it is not possible to smooth them out in 1 time. If a leveling mortar is applied later, it is not necessary for the surface to be perfectly flat. If only one coating is applied, pay more attention to the smooth and smooth finish. If necessary, sand again with coarse sandpaper (40 or 60 grit) after curing.

Filling shrinkage cracks in a cement screed

Supplies:

Cement screeds can sometimes show shrinkage cracks. These cracks can be recognized by their size (they are very narrow) and they are often present over the entire surface of the floor. These cracks can often be visible even after applying a primer and coating, so if the floor needs to be completely flat and of high quality, it is important to address these cracks in advance.

Step 1. Mixing the resin

For small quantities, mix the epoxy concrete primer and hardener with a mixing cup on a scale. For larger repairs, you can mix the entire package by adding the hardener to the primer and mixing with a metal mixer. Please note that the processing time is limited when creating large quantities.

Step 2. Filling cracks

Pour the epoxy mixture over the floor. Spread the primer with a floor mop and then leave for 10 minutes. The cracks then slowly absorb the epoxy and often become visible again after 10 minutes. Spread epoxy again with the floor squeegee and let it sit for a while. The idea is to spread as much epoxy into the cracks as possible. Then let it harden for at least 20 hours. Make sure you continue within 48 hours for optimal (chemical) adhesion.

After curing, you can apply another layer of primer. You can also divide this layer twice with the eraser. If all goes well, the cracks are now filled and a floor coating can be applied.

Help with concrete repair with epoxy?

With these tips you can get started yourself! Do you still have questions about concrete repair with epoxy? Please feel free to contact us. Our team is happy to advise you.

Product advisor
  • Expert advice
  • Superfast delivery with PostNL
  • Pay after delivery

Products used in this article

Product 1 of the 2

Request a step-by-step plan

Request a tailor-made step-by-step plan now! As soon as we have received the information below, we will tell you exactly what you need. Then you can immediately start laying the perfect floor.

How can we help you?

  • 1 We receive your request
  • 2 We make a custom plan and discuss it with you
  • 3 Within a few days you will have all the materials at home
  • 4 We help you step by step with all your questions about your floor

All about installing or repairing epoxy floors

Here you can find all 16 related articles on this topic. Mis je informatie om aan de slag te gaan met jouw klus? Neem dan contact met ons op.

Repairing an epoxy gravel (granular) floor Repairing an epoxy gravel (granular) floor
Decorative gravel floors can become damaged over the years. Pieces may come loose or a piece of flooring may need to be repaired. Epoxy gravel floors then offer… More information
Priming concrete and cement floors with epoxy Priming concrete and cement floors with epoxy
A correct surface is very important for a perfect finish of a floor with epoxy or polyurethane. By treating the surface correctly, you ensure that the surface i… More information
Applying epoxy floor coating [manual] Applying epoxy floor coating [manual]
With this manual, you can easily apply an epoxy floor coating yourself. One of the advantages of epoxy is that the product is easy to process and resists heavy… More information
Pre-treating tile floor for epoxy floor coating Pre-treating tile floor for epoxy floor coating
Is it possible to apply an epoxy floor coating over a tiled floor? This is a question we are regularly asked. The answer to this is: yes, it is certainly possib… More information
Preparing wooden floors for epoxy flooring Preparing wooden floors for epoxy flooring
Contrary to popular belief, wooden floors can also be covered with an epoxy coating or with poured epoxy flooring. Follow the steps below to make a wood floor t… More information
Repairing holes and cracks in cement/concrete floors Repairing holes and cracks in cement/concrete floors
You can easily repair concrete with epoxy yourself. Concrete floors can be damaged, which can make it difficult to apply an epoxy coating or cast floor or will… More information
Priming basement floors and walls Priming basement floors and walls
Basements and cellars are often somewhat stuffy and damp spaces. This is often because the floor and walls allow moisture to penetrate. To give the floor and wa… More information
Leveling a concrete floor with epoxy Leveling a concrete floor with epoxy
In some cases it may be necessary to level a concrete floor with leveling epoxy before applying a floor coating or an epoxy cast floor. Concrete floors with a c… More information
Matt floor coating for epoxy cast floors [manual] Matt floor coating for epoxy cast floors [manual]
In this article, we will explain how to apply a matt-gloss coating to an epoxy floor. This is an easy-to-apply product with good properties. For example, the… More information
Epoxy flooring over tiles in the bathroom Epoxy flooring over tiles in the bathroom
Do you no longer like the tiled floor in your bathroom or worse: do you have leaks along the joints? Then an epoxy floor offers an excellent and modern solution… More information
Sleek epoxy residential floor by CreaChick Sleek epoxy residential floor by CreaChick
CreaChick and CreaRick, known from Youtube, took up the challenge and created a super nice epoxy floor in their studio. There was a lot involved, as tiles als… More information
Commercial space with an epoxy floor Commercial space with an epoxy floor
Are you moving to a new commercial building and do you want a rock-solid cast floor in the office right away? Stop searching, Polyestershoppen is the specialist… More information
Installing a sleek epoxy garage floor Installing a sleek epoxy garage floor
Are you completely fed up with that dirty concrete floor in your garage? Are you constantly bothered by dust? Or do you want to use your garage as a utility r… More information
What is the difference between an epoxy screed and epoxy floor coating? What is the difference between an epoxy screed and epoxy floor coating?
We are regularly asked what the difference is between epoxy floor coating and epoxy cast flooring. And what the difference is in price. In this article, we will… More information
5 benefits of an epoxy cast floor 5 benefits of an epoxy cast floor
It is wildly popular: a sleek epoxy cast floor in homes, sheds, garages and office buildings. At Polyestershoppen, you will find all the products you need to la… More information
Do you want to install an epoxy cast floor yourself? Read our manual Do you want to install an epoxy cast floor yourself? Read our manual
Do you want to install an epoxy cast floor yourself? With the help of this manual, we will explain to you in detail how to apply an epoxy cast floor yourself! O… More information

Do you have a question?

Do you have a specific question? Call one of our specialists for free advice +3185 0220090