How to Paint Brick Correctly: A 2026 Guide to Lasting Results

Painting brick can dramatically update the look of a home's exterior or an interior fireplace, but it is a permanent decision that requires specific techniques for a durable finish. Based on our experience assessment, the core to a successful project lies in proper surface preparation, using the correct masonry-specific products, and understanding that not all brick is a suitable candidate for paint. Rushing the process or using standard paint can lead to peeling, moisture trapping, and costly damage.

What Type of Brick Can Be Painted?

Before beginning, it's crucial to assess the brick's condition. Painting brick is not recommended for all situations. Industry experts advise against painting brand-new, highly porous brick. The brick should be allowed to weather for at least a full year. This waiting period permits a process called leaching, where alkalis from the mortar and a white, powdery residue called efflorescence naturally work their way out of the material. Painting too soon can trap these elements, leading to paint failure.

Additionally, you should never paint the interior firebox of a masonry fireplace where it will contact open flames, as standard masonry paint cannot withstand such intense heat. For brick that is already damaged or has old, flaking paint, significant preparation work—including repointing damaged mortar and complete paint removal—is necessary before a new coat can be applied.

What Supplies Do You Need to Paint Brick?

Gathering the right materials is the first practical step. Using standard interior wall paint on brick will not yield a lasting result. You will need products designed for masonry surfaces.

• Trisodium phosphate (TSP) cleaner or a strong, grease-dissolving detergent.
• A stiff scrub brush and access to a pressure washer for large exterior areas.
• Masonry sealer, a liquid coating that prevents moisture from seeping into the porous brick.
• Alkali-resistant primer or a combined primer-sealer product.
• High-quality masonry paint (available in flat or semigloss finishes).
• A roller with a thick nap (3/4 to 1 inch) and an angled nylon/polyester brush.
• Painter's tape, drop cloths, acrylic caulk, and a caulk gun.

How Do You Prepare the Brick Surface for Painting?

Surface preparation is the most critical phase and cannot be rushed. Proper cleaning and sealing are essential for paint adhesion and longevity.

1. Clean Thoroughly: Start by removing all dirt, cobwebs, and mildew. Use a TSP solution and a stiff brush to scrub the brick vigorously. For exterior walls, a pressure washer is highly effective. After cleaning, the brick must dry completely for at least 24 hours.
2. Inspect and Repair: Once dry, inspect the mortar joints. Use acrylic caulk to fill small holes or gaps. For larger areas of crumbling mortar, a process known as repointing—removing the old mortar and replacing it with new—should be completed by a professional mason to ensure the structure is watertight.
3. Apply Masonry Sealer: Brick is naturally porous. Applying a masonry sealer is a non-negotiable step to block moisture. As one expert notes, water trapped behind paint can freeze and cause spalling, where the brick surface peels or pops off. Roll the sealer onto the entire surface and allow it to dry according to the manufacturer's instructions, typically 4-12 hours.

What is the Correct Process for Applying Paint?

After the sealer is dry, the painting process can begin. Using a primer is highly recommended, especially if efflorescence was present.

1. Apply Primer: Use an alkali-resistant primer to create a uniform surface for the paint. If you are dealing with stubborn stains or mineral deposits, multiple coats of primer may be necessary. Allow the primer to dry fully, which can take four hours or more.
2. Paint with Masonry Paint: Masonry paint is specifically formulated to expand and contract with temperature changes, resisting cracking and peeling. Using a clean roller with a thick nap, apply the first coat. An angled brush is useful for cutting in around edges and windows. A second coat is often required for full, even coverage. Choose a flat finish to hide surface imperfections or a semigloss for easier cleaning.

Conclusion: Key Takeaways for a Professional Finish

A successful brick painting project hinges on patience and precision. The most critical step is comprehensive surface cleaning and sealing to prevent moisture-related damage. Always use primer and paint products labeled explicitly for masonry to ensure durability against the elements. Finally, understand that this is generally a permanent application; removing paint from brick is exceptionally difficult. By following these steps, you can achieve a fresh, updated look that protects your brick for years to come.