How to Prepare & Coat a Garage Floor

Garage with tan colored walls and finished floor

A great looking finish begins with the right start. Following the proper prep procedures will dramatically affect the look and longevity of your finished project.

For Best Results:

Before any coating is applied to the surface, be sure to etch and clean uncoated concrete. Already coated concrete needs only to be cleaned.

Once the surface is clean and dry, apply BEHR PREMIUM® Concrete & Masonry Bonding Primer to any uncoated surface.

For coated concrete surfaces, see the coating product label for primer recommendations.

How to Clean and Etch a Garage Floor

  1. Step 1
    Using a rag, wipe off all oil and grease spills from the concrete surface. Remove all dirt or debris with a broom.

  2. Step 2

    Pour a concrete and masonry cleaner and etcher into a plastic watering can or plastic pump sprayer. Using the sprayer, apply the product to the uncoated concrete floor. Allow the product to remain on the surface for 10-20 minutes.

  3. Step 3

    Using a stiff bristled, non-metal brush or broom, vigorously scrub the concrete surface. DO NOT allow the surface to dry.

  4. Step 4

    Thoroughly rinse the entire concrete floor with clean water using a garden hose with a high-pressure nozzle, or a pressure washer.

  5. Step 5

    Using a non-metal squeegee or mop, remove the excess water from the entire project area.

  6. Step 6

    Allow the area to dry.

How to Prime a Garage Floor

  1. Step 1

    Pour thoroughly mixed primer into a bucket and dip a quality 2"-2 ½" (5.1 - 6.4 cm) wide nylon/polyester brush into the primer.

  2. Step 2

    With your brush, paint (cut in) a 2"-3" (5.1 - 7.6 cm) wide area around the perimeter of the garage floor. Start in a corner and continue along the edge of the wall.

  3. Step 3

    From the bucket, pour primer into a paint tray and work a roller into the tray until it is fully loaded with primer. For best results, use a 1/4" - 3/8" (6.4 - 9.5 mm) nap roller, nylon/polyester brush or a pad applicator.

  4. Step 4

    Starting at a corner of the floor, roll the primer onto a 4' (1.2 m) long x 2' (0.6 m) wide section.

  5. Step 5

    Reload the roller with primer and continue to the next 4' (1.2 m) long x 2' (0.6 m) section. As you go, roll back into the previously applied area.

  6. Step 6
    Repeat the process until the entire floor is covered. Allow the surface to dry a minimum of 8 hours before applying a topcoat.

How to Coat a Garage Floor

  1. Step 1

    Pour thoroughly mixed floor coating into a bucket and dip a quality 2"-2½" (5.1 - 6.4 cm) wide nylon/polyester brush into the coating.

  2. Step 2

    With your brush, paint (cut in) a 2"-3" (5.1 - 7.6 cm) wide area around the perimeter of the floor. Start in a corner and continue along the edge of the wall.

  3. Step 3

    From the bucket, pour the floor coating into a paint tray and work a roller into the tray until it is fully loaded with coating. For best results, use a 3/8" (9.5 mm) nap roller, nylon/polyester brush or an airless sprayer (.015" (0.38mm) -.021" (0.53 mm) spray tip, 60 mesh filter).

  4. Step 4

    Starting at a corner of the floor, roll the coating onto a 4' (1.2 m) long x 2' (0.6 m) wide section.

  5. Step 5

    Reload the roller with coating and continue to the next 4' (1.2 m) long x 2' (0.6 m) section. As you go, roll back into the previously applied area.

  6. Step 6

    Repeat the process of painting sections and back rolling until the project is complete.

Suggested Tools & Supplies
  • Bucket

  • Broom (Stiff Bristle)

  • Brush 5.1 - 6.4 cm (2"-2½")

  • Bucket Grid

  • Chemical Resistant Gloves

  • Extension Pole

  • Hose

  • High pressure Nozzle

  • Mop

  • Paint Can Opener

  • Paint Tray

  • Paint Tray Liner

  • Protective Apparel

  • Pump Sprayer

  • Rags

  • Roller Cover

  • Roller Frame

  • Stir Stick

More How-tos
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