DIY Concrete Sealing: Step-by-Step Guide

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Do you have concrete surfaces around your property that need sealing? Sealing concrete regularly can improve its look, increase its durability, and protect it from the weather and other damaging elements. The good news is that you can do the sealing job yourself with a few simple steps and the right materials.

In this guide, you’ll learn everything you need to know about sealing concrete, from why you should seal it to the steps you’ll need to follow for a successful DIY job. We’ll cover everything from preparing the concrete surface to choosing the right sealant and curing the concrete so that it lasts for years to come.

Concrete sealing is an important part of owning or maintaining any concrete surface, whether it’s a patio, driveway, garage floor, or walkway. You’ll have to understand the basics of concrete sealing and the steps involved to get the job done right. To get started, let’s take a look at what concrete sealing is and why it’s important.

Prepare the Concrete

Preparing your concrete for sealing is essential to achieving a professional finish. By following the steps outlined below, you can easily and efficiently prepare your concrete for sealing.

1. Cleaning the Concrete:

The first step in preparing the concrete for sealing is cleaning it. It is important to spotless the concrete to remove dirt, debris, and any other contaminants that may be on the surface. Start by sweeping the area with a broom and then use a pressure washer to remove any remaining materials. For stubborn stains, use a sturdy brush and a cleaning solution specifically designed for concrete surfaces.

2. Applying a Concrete Etching Agent:

Once the concrete is clean, it is important to apply a concrete etching agent. This will etch the surface of the concrete, creating microscopic pores that will help the sealant adhere to the concrete. Be sure to read the instructions on the etching agent, as the application process may vary depending on the brand.

3. Pressure Washing:

Once the etching agent has been applied, it is important to pressure wash the concrete to remove any remaining residue. Doing so will help ensure that the sealant will properly adhere to the surface. When pressure washing, use a low-pressure setting and keep the nozzle at least six inches away from the surface.

These three steps – cleaning, applying an etching agent, and pressure washing – will help to ensure the concrete is thoroughly prepared for sealing. When prepping the concrete, be sure to wear protective clothing and eyewear to avoid any potential hazards.

Apply the Sealant

Now that the concrete has been thoroughly prepared, it’s time to start sealing it. This is an important step in the sealing process and needs to be done correctly to get the desired results. Here, we’ll discuss the basics of applying the sealant, so you can get a professional-looking finish for your concrete.

1. Choosing the Right Sealant:

The first step is to choose the right sealant for the job. It’s important to select one that is specifically designed for concrete surfaces. There are several types of sealants available in the market, so make sure to pick the one that is best suited for the job. Once you have chosen the appropriate sealant, it’s time to apply it.

2. Applying the Sealant:

Start by applying the sealant with a paintbrush or roller. Make sure to cover the entire surface with the sealant, taking care to cover any cracks or crevices. Avoid over-applying the sealant as it can leave behind a dull finish.

If you want to get an even better finish, you can use a sealant sprayer. This allows you to evenly distribute the sealant and get a more consistent finish. Make sure to follow the directions on the sealant’s packaging to ensure you are applying it correctly.

3. Applying a Second Coat of Sealant (If Necessary):

Once the first coat of sealant is dry, you may want to apply a second coat. This will give the concrete an even more durable finish and enhance its appearance. Again, make sure to follow the instructions on the sealant’s packaging.

When applying the second coat, use the same technique that you used for the first coat. Allow the sealant to dry completely before moving onto the next step. This is a time-consuming process, but it’s important to get it right to get the desired results.

Now that the sealant has been applied, it’s time to move onto the final step. The sealant needs to be given time to cure and dry before it can be used.

Finishing Up

Once you have applied the sealant, it is time to finish the process. The first step is to clean up any excess sealant. You can do this by using either a damp cloth or a soft brush. Make sure to go around the edges and corners to ensure that no sealant is left behind.

Once the sealant is fully dry, it is important to cure and dry the concrete. This helps set the sealant and ensure that it will last for a long time. To do this, leave the concrete undisturbed for at least 24 hours. You can then apply a light layer of water on the surface to help the curing process. Typically, it takes 3–5 days for the sealant to fully cure and dry.

Enhancing Durability:

To ensure that your concrete is properly sealed and will last for a long time, you should consider a few steps to enhance its durability. The first step is to make sure that you are sealing your concrete in ideal conditions. This means making sure that the temperature is between 50-90 °F and the humidity level is between 10-50%.

In addition to this, you should also consider applying more than one coat of sealant. The more coats of sealant that you apply, the better the protection you will have. You should always wait 24 hours between each coat for the sealant to fully dry.

Finally, you should also consider having a professional inspection done periodically to check for any issues or damage. This can help identify any problems before they become too severe.


Knowing how to troubleshoot common issues when sealing concrete can help you achieve the desired results and a professional finish. Here are some of the most common issues you may encounter when sealing concrete and how to resolve them.

  • Uneven Sealant: If you find that the sealant you applied is uneven or patchy, it could be due to inconsistencies in the surface of the concrete. To fix this, you will need to go over the areas with uneven sealant with a brush or a broom. This will help to even out the sealant and create a more consistent finish.
  • Bubbles and Blisters: Bubbles and blisters can form when air pockets become trapped beneath the sealant. To prevent this from happening, make sure to roll or brush the sealant evenly on the concrete and avoid over-sealing. If you do find bubbles and blisters, you can puncture them with a needle and then brush the sealant to seal them.
  • Mottling: Mottling can occur when the sealant is not allowed to dry properly between coats. To prevent this from happening, always allow the sealant to dry completely before applying a second coat. If you do notice mottling, you can try to remove it with a putty knife or a stiff brush.
  • Water Leaks: Water leaks are caused by a build-up of pools of water on the surface of the concrete. To prevent this from happening, always make sure to apply a sealant with a high water resistance rating. You should also make sure that the concrete is completely dry before applying the sealant. If you do notice water leaks, you can apply a second coat of sealant to help seal them.
  • Uneven Colour: Uneven colour can be caused by using a sealant that is not designed for outdoor use, or if you apply the sealant too thickly. To achieve a more even colour, make sure to use a sealant that is designed for outdoor use and apply it evenly in thin layers. You can also use a roller or brush to help even out the colour.

These are some of the most common issues you may encounter when sealing concrete and how to resolve them. By following the steps outlined in this guide, you should be able to get a professional finish that will enhance the durability of your concrete.


Sealing your concrete is an easy way to not only enhance its aesthetic appeal, but also increase its durability. Not only will it look great, but you can also rest assured that it will last you for many years to come.

This DIY guide has provided you with a step-by-step process for successfully sealing concrete. After preparing the surface of the concrete, you can apply a sealant, adding a second coat if necessary. Following this, you can clean up any excess sealant, and then cure and dry the surface.

When it comes to enhancing the durability of your concrete, the ideal temperature and humidity for sealing should be taken into consideration. Additionally, it is important to inspect the area regularly for any potential issues that may arise.

Finally, it is worth noting the benefits of sealing your concrete. Not only will it enhance the overall look, but also help protect against fading, staining, and abrasion. Additionally, it will reduce the amount of maintenance required, and help maintain the original condition of the concrete for many years to come.

In conclusion, sealing your concrete is a great way to increase its aesthetic appeal and durability. With the help of this DIY guide, you now have the knowledge and tools necessary to successfully seal your concrete and create a professional finish.

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