how to clean concrete floor before epoxy?

Cleaning concrete floors is a big job. It can be frustrating, time-consuming, and messy. After all of your hard work you want it to look its best when it’s done, so how do you make sure your concrete floor looks perfect before applying epoxy?

It’s important that you have the right tools for the job and know how to use them properly to ensure that your finished product is as clean as possible.

What do you clean concrete with before epoxy?

You need to remove paint and old epoxy before you start your new floor.

It’s best to use a pressure washer on concrete, but it can also be done with a scrub brush.

You should use a cleaner that will work with the concrete, not against it. That means no bleach! If you have oil stains, you should get them out before applying the epoxy, or else the sealer won’t stick properly.

How do you prep a concrete floor for epoxy?

  • Clean the floor and make sure it’s dry.
  • Apply a primer, like a concrete bonding agent, which will help hold the epoxy to your concrete. The primer also provides better durability for your flooring in the long run.
  • Apply a base coat of epoxy, which should be at least 1/8 inch thick (or 3 millimeters) and provide long-lasting wear from heavy foot traffic or other impacts on your new surface.
  • Finally, apply an additional topcoat for added sheen if desired—you can choose matte or glossy finishes depending on what looks best in your space!

Can you epoxy over dirty concrete?

Yes, you can epoxy over dirty concrete. However, it is best to clean the floor before applying epoxy. This is because epoxy needs to bond well with the concrete in order for it to be durable and last long.

If there is any dirt or oil on the surface of your concrete floor, this could cause a lack of bonding between your floors and make it more difficult for you to clean off anything stuck onto them later on down the road.

It might also cause an uneven finish if there are some areas that are cleaner than others! So how do you get that old grime off?

The easiest way is by using a pressure washer since most homeowners have one lying around somewhere (like under their sink).

Simply put on safety glasses and blast away! If you’re worried about damaging any furniture/furnishings nearby then just keep moving back until all of your surfaces have been cleaned properly.”

Do you have to acid wash concrete before epoxy?

For most projects, you do not need to acid wash concrete before epoxy. The best way to prepare concrete before epoxy is with a broom, broom attachment (if you have one), or pressure washer.

  • Sweep the floor
  • Use a mop with water and an all-purpose cleaner

This will get rid of any loose dirt and debris that may interfere with adhesion of your coating or paint job. If there are any contaminants present that cannot be removed by sweeping or mopping, we recommend using a commercial grade stripper to remove them before applying your coating of choice.

How do you clean concrete before coating?

The best way to clean concrete before a coating is to sweep your concrete surface, then use a non-residue cleaner. Rinse the concrete surface with water, and allow it to dry completely.

You should be able to clean grease or oil stains from the surface with ordinary household cleaners.

If you have any cracks in your concrete flooring, fill them in before coating it so that they don’t show through when you lay down epoxy on top of them!

What do you clean concrete with before painting?

There are several ways to clean concrete. The most common methods are using a power washer, pressure washer or broom.

If you’re curious about which method will work best for your situation and budget, let’s take a look at each one.

What is the best way to prep a garage floor for epoxy?

The first step you need to take to prep your garage floor for epoxy is cleaning it. You should use a concrete cleaner and degreaser. This will remove any oil stains or paints from the surface of the concrete, leaving it clean and ready for epoxy.

Next, you’ll want to etch your garage floor so that it’s ready for an epoxy coating. After cleaning the surface, apply an acid solution with a sprayer (or even just a garden hose) in order to create small holes in the surface of your garage floor.

These holes allow any contaminants that may still be on thereafter to be cleaned off of your garage floor surface so they can be washed away during the application of an epoxy coating later on down this list!

Do you need to prime concrete before epoxy?

There are two main reasons you should prime concrete before epoxy: one, to improve the bond between the concrete and epoxy; and two, to help fill in any small cracks or pores that may be present in the concrete.

If you don’t prime your floor with a primer, you run the risk of not getting a good bond between your floor and paint job.

This can lead to chipping or peeling down the line (and make for an ugly mess). For example, if there are holes in your concrete that aren’t filled by applying primer, then when you apply your epoxy paint over it (which will also fill those holes), those holes will remain open – meaning that moisture can get into them more easily than if they were sealed first by applying some sort of sealant like primer beforehand.


In conclusion, here are the five steps to cleaning concrete before epoxy:

  • Remove dirt and grease with a pressure washer.
  • Use a detergent and water solution to remove oil stains.
  • Use a degreaser to remove general grime and other stubborn stains.
  • Rinse the floor thoroughly with clean water after using any chemicals, especially if you’ve used a degreaser or oil-based cleaner.

Remember that epoxy can be applied over many surfaces, including concrete floors that have been properly cleaned for their application.

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Martin Flood

Martin Flood has been working in the construction industry for over 20 years as a general contractor with expertise in remodeling projects that are large or small. He has furthered his career by specializing in epoxy resin flooring, providing excellent service to both commercial and residential clients. Martin’s experience enables him to offer professional advice on how to choose the right type of project based on your needs and budget.

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