How to Prepare Your Garage Floor For Epoxy Coating

prep garage floor for epoxy

To prepare your garage floor for epoxy coating, you will first need to remove the existing layer of surface material. This process opens the pores in the concrete to allow the epoxy to adhere properly. Some common surface preparation techniques include acid etching and diamond grinding. Once the floor is properly prepared, you can use a flake coating to add an extra layer of protection. To learn more about how to prepare your garage floor for epoxy, read on.

Acid etching

Preparing your garage floor for epoxy coating is easier than you might think. All you need is a bucket of acid and baking soda. Mix the two and add water. Mix until the acid and baking soda mix is homogeneous. Apply the mixture to your concrete, and wait at least two to 15 minutes. Allow the surface to bubble and fizz before rinsing it thoroughly. Repeat this process if necessary.

To prepare the surface for etching, wet the concrete thoroughly with water. Use a plastic sprayer to ensure an even distribution. Also, use a watering can if necessary. To minimize contact with the acid, keep the surface wet while you etch it. Apply the solution to the entire concrete surface. Then, allow the mixture to set for at least an hour. Afterward, apply the epoxy to the wet concrete.

Shot blasting

If you are planning to apply a new coating on your garage floor, you should consider shot blasting it first. This is a relatively inexpensive way to prep the concrete surface before applying a new coating. It also produces minimal airborne dust, making it an excellent option for large areas. Shot blasting is not recommended for heavy elastomeric or rubbery mastics, though it is effective in preparing a surface for the application of a new coating.

The process of shot blasting requires that the concrete surface be mechanically diamond-ground and leveled before the coating is applied. This method is superior to grinding because it requires minimal clean-up after the application. It also helps ensure that the epoxy mortar system adheres to the concrete surface. And unlike the concrete grinding process, shot blasting is also recommended for garage floors, where a lot of traffic is expected. It is also recommended for garage floors that are prone to cracks and other imperfections.


To apply epoxy flooring to your garage floor, mix it thoroughly and spread it on the garage floor. If the surface is concrete, you can use wide painter’s tape to mask the edges. Plastic sheets can be used on the bottom foot of the walls. If you have baseboards, you can remove them and spread the epoxy right next to them. After the paint is applied, allow the floor to dry for at least 12 hours. After that, you can apply the hardener.

You can also use a nine-inch roller with medium nap, which can be mounted on a pole and dipped in the bucket of epoxy. Then, work in a four-foot-square area and apply the epoxy in a large “W” pattern. Make sure the edges are wet and dry, as the first coat is the most challenging. Once it has dried, repeat the process as necessary. For a perfect finish, allow the garage floor to dry for at least 24 hours before applying the next coat.


First, you need to make sure the floor is dry. The temperature must be 50 to 80 degrees for the epoxy to cure. If the temperature is too high or too low, the epoxy coating may bubble or peel. You also need to allow the floor to dry completely, typically 12 to 24 hours. To prevent this from happening, you can tape off the area underneath the garage door with duct or masking tape. This will help prevent the epoxy from being sprayed on the garage door and surrounding area.

You can prepare the concrete floor by cleaning it first with a broom. If the concrete floor is cracked or has any other imperfections, you can use a concrete patch or concrete filler. Be sure to scrub the floor with a stiff brush to remove any grit. The next step in the process is to apply the surface flakes. You should wait 24 hours after the epoxy is applied before using it to prevent it from sagging.