How to Apply Garage Floor Epoxy

Clean garage
RobertCrum / Getty Images
Project Overview
  • Working Time: 8 - 10 hrs
  • Total Time: 2 days - 1 wk, 1 day
  • Skill Level: Beginner
  • Estimated Cost: $150 to $250

The standard for a tough, good-looking surface on the garage floor is garage floor epoxy. Although it's commonly referred to as epoxy paint, in reality, epoxy and paint are different products with different chemical compositions. The application of garage floor epoxy can vary a little from product to product, so be sure to check the instructions on the product you choose. Find out how to apply garage floor epoxy with this informative guide.

Epoxy Floor Coating Benefits

Epoxy coating has superior durability to paint and it is even chemical resistant, making it ideal for the garage. Epoxy offers resistance to motor oil, gas, bleach, acids, and other common chemicals. This floor coating option is also resistant to staining and abrasive damage. Epoxy is available in a wide range of colors, styles, and patterns, including custom designs created by adding color chips to the epoxy during installation.

Closeup of finished garage floor coated with epoxy

The Spruce / Grant Webster

DIY Vs. Professional Application

Applying an epoxy floor coating to the garage floor is a relatively simple job that can be completed as a DIY project. Even beginner DIYers can tackle this project with time and patience. Just make sure to properly read and follow the directions to avoid complications.

If you opt for professional application, the obvious benefit is that the quality of the work will reflect the experience and skill of the contractor. However, the main drawback of hiring a professional contractor is that this project can cost between $1,529 to $3,221, or about $3 to $12 per foot. For comparison, DIY epoxy application costs about $2 to $5 per square foot.

Epoxy applied to a garage floor

The Spruce / Grant Webster

Tips for Epoxy Floor Coatings

Epoxy garage floor coating is commonly sold in kits that include two-part epoxy, etching solution, and decorative color chips (which are optional) as well as complete instructions. Color choice is very limited, as many coatings are simply gray, while some are brown or off-white. Check the contents of the kit so you know which additional supplies are required.

Epoxy floor coatings work best on a concrete floor that is in good shape, without serious cracks, chips, or spalls. A brand new concrete slab is best, but older slabs can work fine if you first repair and patch the concrete. Most minor cracks and chips can be easily repaired with any concrete patching product. Make sure the patched areas dry and cure fully before applying epoxy over them. After patching, also make sure that the concrete is degreased and properly etched, as directed by the manufacturer of the epoxy.

What You'll Need

Equipment / Tools

  • Broom
  • Wet/dry shop vacuum
  • Stiff brush
  • Garden hose
  • Work gloves
  • Eye protection
  • 3-inch paintbrush
  • 9-inch paint roller with 1/2-inch-nap roller cover
  • Roller extension handle

Materials

  • Concrete degreaser
  • Epoxy floor coating kit
  • Painter's tape

Instructions

How to Apply Garage Floor Epoxy

  1. Remove Dust, Dirt, and Debris

    Use a broom, flat-edge shovel (or metal scraper) and shop vac to quickly and effectively clean the garage floor, removing any loose or stuck-on dust, dirt, and any other debris.

    a shop vacuum sitting on the garage floor
    terminator1​ / Getty Images
  2. Degrease the Garage Floor

    Wet the entire floor with a hose and then apply degreaser in about five-foot by five-foot sections. Use a power scrubber with a brush attachment to degrease the majority of the floor. For tight corners and along the walls, switch to a stiff-bristle brush to scrub away any grease or grime.

  3. Etch the Concrete

    Etching the concrete floor is the process of marring the surface of the concrete to improve adhesion. Follow the directions provided by the manufacturer to mix the etching solution with water. After mixing, pour the solution onto the floor and use a stiff-bristle brush or a broom to work the etching solution into the concrete.


    This process typically takes about 20 to 30 minutes. 

    Warning

    Wear long sleeves. long pants, closed-toe shoes, gloves, safety glasses, and a mask while you work. Etching solutions are usually a diluted form of muriatic acid, so it's important to avoid breathing the fumes or coming in contact with the etching solution.

    Mixing the concrete etching solution

    The Spruce / Grant Webster

  4. Rinse the Garage Floor

    After waiting about 20 to 30 minutes for the etching solution to work, use a hose to thoroughly rinse the area, then allow the floor to dry completely before proceeding. 

    Rinsing the concrete garage floor

    The Spruce / Meg MacDonald

  5. Prepare the Room

    Apply wide painter’s tape along the bottoms of the walls, and remove the baseboards.

    Preparing the garage floor with painter's tape

    The Spruce / Grant Webster

  6. Mix the Epoxy

    Check the product direction provided by the manufacturer before mixing the epoxy. This will help you identify any time constraints, like the drying time or the amount of time the mixture will need to sit after mixing.

    A two-part epoxy consists of a hardener or activator and a resin, which must be mixed just before application. Stir the resin a bit, then begin pouring the catalyst in while continuing to stir. Once the catalyst container is empty, stir for another few minutes until the two parts are thoroughly mixed.

    Put the lid back on the mixture and let it rest for the amount of time specified by the manufacturer, which will vary depending on the temperature. If you are using decorative color chips, do not add them to the mix.

    Mixing the epoxy in a bucket

    The Spruce / Grant Webster

  7. Apply the Epoxy

    Start applying the coating as soon as the epoxy mix is ready. In most cases, the epoxy will start to harden within about two hours, so make wise use of your time and keep the garage well-ventilated throughout the application and initial curing.

    Use a three inch paintbrush to cut in along the edges, then use a nine inch roller with a 1/2-inch-nap roller cover to spread epoxy on the floor. Work in 10 by 10-foot sections.

    Maintain a wet edge by rolling over the edges of previously applied epoxy, and be sure to roll an even coating. If you are applying a second coat, wait at least 12 hours before application.

    Applying the epoxy mixture to the garage floor

    The Spruce / Grant Webster

  8. Add Color Chips

    If you are using decorative color chips, apply them by hand over each section after you’ve spread the epoxy. Take a small number of chips in your hand and toss them up and out onto the floor. Again, a helper can speed this process up.

    After adding color chips to complete the finish wait at least 24 hours before walking on the epoxy surface. You should wait to pull a vehicle into the garage for about four to seven days to avoid damaging the new epoxy garage floor.

    Applying the color chips to the epoxy

    The Spruce / Grant Webster

FAQ
  • How long does epoxy flooring last?

    On average, an epoxy garage floor will last about 10 to 20 years depending on the frequency of use and ongoing maintenance.

  • Can I epoxy my garage floor myself?

    While you can hire a professional contractor to complete this job, if you have the time and the patience to learn how to apply garage floor epoxy, then adding one or two coats of epoxy to the garage floor is a great DIY project that even beginners can tackle.

  • What is the downside of epoxy flooring?

    Epoxy coatings typically take longer to apply than paint and may also take longer to properly dry and cure. Additionally, epoxy floor coating finishes can be slippery when wet and cannot be applied to new concrete floors until about 30 days have passed to allow the concrete to cure.

The Spruce uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.
  1. Learn how much it costs to Coat Concrete With Epoxy. (n.d.). https://www.homeadvisor.com/cost/outdoor-living/install-concrete-coating/

  2. Epoxy Resins. American Chemistry Council.