Seal concrete by cleaning and drying it and applying at least two thin layers of sealer using a long-handled roller brush. Apply the sealer is small sections, and wait for it to dry to ensure that the concrete is completely covered and that the sealer is not bubbling.
- Clean and dry the concrete
Vacuum or sweep the concrete, and then scrub it with a solution of 1 part bleach to 4 parts water. Rinse the concrete, and dry it thoroughly.
- Choose the correct sealer
Concrete sealers come in two main varieties: penetrating and film forming. Film-forming sealers leave a glossy finish and can be slippery. Penetrating sealers leave a matte finish.
- Apply the sealer and let it dry
Use a paint roller to apply the sealer. If the sealer begins to bubble as it dries, then you are using too much. Once a full layer of sealer has been applied, let it dry completely before adding a second layer.