How to Clean Concrete Before Sealing

We get a lot of questions about how to clean concrete before sealing. This is because there are many different opinions on the best way to prep your concrete for sealant application. We’ve outlined some of the most popular prepping methods below, as well as their pros and cons, so you can choose which one is right for you. 

To ensure that your concrete sealant is applied correctly, you must first do some prep work. First, the surface will need to be cleaned, so it’s free of any dirt and debris. You’ll also need to make sure the surface is dry before applying the sealant. This blog post will teach you how to clean concrete before sealing!

How to Clean Concrete Before Sealing

7 Methods on How to Clean Concrete Before Sealing:

Cleaning and sealing concrete floors takes time. Residents or homeowners might want to consider having the job done by professionals, but if that’s not an option, then here are some methods you can use to ensure your floor is properly cleaned.

1) Water, Alkaline Solutions, and Acid Cleaners:

The best way to getting a good cleaning job done is by using products made for concrete. One of the most popular cleaners used regularly is muriatic acid, available in hardware and some paint stores. It’s fairly inexpensive and does an excellent job when used with a pressure washer, blasting away dirt, grime, mold, mildew stains, or other kinds of soil. This type of cleaner should be used with care because it can damage the concrete if not used properly, which requires hiring a professional to use this method.

2) Spray Cleaner:  

Many spray cleaners are available from many different companies. Some have specialized cleaning solutions that may include mild detergents or other types of ingredients to get the job done. Many are highly effective in cleaning concrete floors, and these products can be found at many stores throughout the country. The key is to find one that works well with your situation because not all cleaners work equally on every type of surface.

3) Powdered Cleaners:  

If you plan on cleaning a small area of your floor, then you might consider using powdered cleaners. This type of cleaner is available from many different manufacturers and can be bought in a small packet designed to clean around 25 square feet or just enough to do not more than one section on the entire floor. To use this type of product, it must be mixed with water to activate it, and this type of cleaner works by using a scouring action that scrubs the surface to remove dirt or grime.

ensures the floor is spotless before sealing

4) Powdered Sealer:  

This is another type of product that you can use to seal your concrete floor before having it cleaned. This is an excellent method because it ensures the floor is spotless before sealing, which protects against any unwanted odors. This type of cleaner comes in a powdered form mixed with water, and it can be purchased at many home improvement stores or through websites online.

5) Dry Sweeping:  

If you don’t have access to a pressure washer, you can use a broom or a dry mop to clean the surface. By doing this, you can remove most of the dirt from the floor, which will make it easier for future cleaning jobs. Once you have removed as much of the crud as possible, then use another method that’s designed to be used with water to get rid of any additional grime, dirt, or debris.

6) Wet Sweeping:  

Using a wet mop is an excellent way to clean concrete, and this type of method can be used in conjunction with other cleaning products that you have available. Many different types of cleaners are designed for use with this method, including those specifically created for concrete surfaces. These types of products are made to work well with wet mops or other types of cleaning tools that are used to scrub the surface as you clean.

Use a Wet Mop

7) Pressure Cleaners:  

Many people have a pressure cleaner on hand, but if it’s not available, then you should consider renting one from your local home improvement store. This type of cleaner can remove dirt and grime from the floor very quickly, and it can be used with either water or a solution made for cleaning concrete. Many different formulas are available in stores, which means you’ll have to read the label to ensure it won’t damage your surface.

5 Things To Consider When Cleaning Concrete Before Sealing

Preventing a High Water-to-concrete Ratio

1. Preventing a high water-to-concrete ratio is the most important factor in successfully sealing your concrete. This means removing standing water and surface contaminants within 24 hours of them forming on the surface of your new concrete finish.

2. Mild, muriatic acid will eliminate many contaminants (rust stains) present in most new concrete. Wait at least a day after applying the acid before sealing the surface with epoxy or polyurethane sealer. The acid will also begin to dissolve some concrete materials. Do not use it on brand new surfaces or on pavers that are more than a year old. The acid will soften the surface, allowing it to be worked with a trowel and will allow for better absorption of epoxy and polyurethane coatings.

3. Concrete can be sealed 1-2 days after being finished to the point of being wet. This can help prevent mild surface staining from asphalt or sealer they use on their equipment during the construction of your project. This is important as the sealer used can cause staining and discoloration of your concrete. It is recommended that you wait a minimum of 2 days before sealing. However, this time will vary depending on climate and other factors.

4. Always seal concrete in the shade to prevent fading from the sun’s UV rays.

5. Sealers take at least 24 hours to cure when applied in low temperatures. Wait until the temperature reaches 65°F (18°C) to apply the sealer.

Always Seal Concrete in the Shade


In conclusion, the best way to clean concrete before sealing is by using a pressure washer and scrub brush. This will not only remove dirt but also help the sealer adhere better to the surface of your driveway or patio. If you want a deep clean, we recommend using soap and water. You can also use bleach or diluted vinegar to get rid of more stubborn stains.

Once your concrete is arid, seal it with any best-selling product! It will keep the surface protected from spills and other elements that could damage the finish on your new space. We hope this article on how to clean concrete before sealing has helped answer any questions you may have had about cleaning before sealing concrete; if not, please let us know!

Jennifer Branett
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