How to Seal Patterned Concrete

Choose a sealer that is formulated for your particular type of concrete. If the installers gave you instructions on the type of sealer to use, then follow their advice. Sealers come in four main types: penetrating, acrylic, polyurethane and epoxy. Each has its benefits and drawbacks regarding expense, ease of application, appearance and durability. In general, Acrylic and polyurethane sealers enhance the color of decorative concrete and are appropriate for both indoor and outdoor use. Penetrating sealer is clear and leaves a matte finish. Epoxy yellows in the sun and is best used indoors.

Clean the surface with a power washer or garden hose. Use stain-specific cleaners to remove grease and rust from the concrete. Allow the surface to dry completely; any moisture left on the concrete will affect the sealer application. Turn off sprinklers that might hit the surface of the concrete. Sweep the surface thoroughly, or use a leaf blower to remove all leaves, dirt and debris.

Apply the sealer evenly to the surface of the concrete, following the manufacturer's instructions. Some sealers can be sprayed on with a pump, while others require a roller. Allow the surface to dry completely before use. Check the label on the container to determine drying time for your sealer.