How to Seal Brick Backsplash

Clean the Brick Surface Thoroughly

Before applying any sealer, it is crucial to make sure the brick surface is completely clean. Use a stiff bristle brush and an abrasive cleaner to scrub away any dirt, grease, or buildup. Rinse thoroughly with clean water and allow the bricks to fully dry before moving to the next step. Dry bricks will allow the sealer to properly soak into the brick.

Choose an Appropriate Brick Sealer

There are various options when it comes to selecting a sealer for brick. Consider if you want a water-based or solvent-based formula. Water-based sealers are lower in odor and easier to apply. Solvent-based sealers provide a glossier finish. Select a penetrating transparent sealer which will protect the brick without altering its natural appearance. Read the product directions to ensure it is intended for use on bricks.

Prepare the Brick Surface

Remove any caulk or grout from the joints between bricks. Mask off any nearby surfaces you don’t want to get sealer on. Apply painter’s tape around the edges of the backsplash. Cover any countertops or floors below. Make sure the area is well-ventilated.

Apply a Test Patch

Before applying sealer to the entire surface, first do a test patch in an inconspicuous area. This will allow you to determine proper application technique and test absorption. Follow the product directions in terms of application method and drying time. Evaluate the test area to ensure you are satisfied with the final sealed appearance before moving on.

Apply the Sealer

Carefully follow the application instructions on the sealer packaging. Most often brick sealers are applied with a paintbrush or paint roller in a thin, even coat. Apply liberally to ensure all the brick surfaces are covered. Let the first coat dry completely per the manufacturer’s directions. In some cases a second coat may be needed for proper protection and coverage. Apply the second coat perpendicular to the first.

Allow Proper Curing Time

It is very important to let the sealer fully cure per the directions before use. This is typically at least 24-48 hours. Do not expose the sealed bricks to water until the curing time is complete. The full sealing properties will develop over the curing time.

FAQs About Sealing Brick Backsplash

How often should I reseal my brick backsplash?

It is recommended to reapply brick sealer every 2-3 years on average. High traffic areas may need more frequent reapplication. Reseal any time you notice water starting to soak into the brick again.

What is the best sealer for a brick backsplash?
Look for a penetrating sealer formulated for porous masonry. Siloxane and silicone based sealers work well. Avoid film-forming surface sealers.

How do I apply sealer to brick?
Use a paintbrush, roller, or sprayer to generously apply an even coat across all brick surfaces. Allow to soak in and dry fully before adding a second coat if needed.

Should I seal both sides of a brick backsplash?
Only the front surface needs sealing. The back side that faces the wall does not require sealer.

What happens if I don’t seal my brick backsplash?
Without sealer, liquids can soak into the porous brick and cause staining, salt deposits, and damage over time. Sealing protects the brick surface.

Can I use brick sealer on a painted brick backsplash?
No, only unpainted and untreated brick needs a protective sealer. Use a compatible clear coat designed for painted surfaces.


Sealing a brick backsplash is a relatively simple and inexpensive way to protect it from water damage and staining. The key steps include thorough cleaning, choosing the appropriate sealer, proper application, and adequate curing time. Brick sealers help retain the beauty and longevity of a brick backsplash by creating a water-repellent barrier. With a quality penetrating sealer applied every few years, you can easily maintain the attractive appearance of your brick backsplash. Carefully follow the product instructions and safety precautions when applying any sealer. With the right preparation and technique, sealing your brick backsplash can help preserve its durable charm.