How To Clean Brick Backsplash And Do A Great Job

Brick absorbs grease. That’s the problem nobody mentions until their kitchen backsplash looks permanently stained after six months of cooking.

Knowing how to clean brick backsplash correctly depends on whether your brick is sealed or unsealed, real clay or veneer, and what type of stain you’re dealing with. The wrong cleaning method pushes grease deeper into the porous surface instead of removing it.

This guide covers the specific tools, cleaning agents, and step-by-step methods for every type of brick backsplash. You’ll learn how to remove grease stains, treat mold in grout lines, handle efflorescence, and seal the brick properly after cleaning to prevent future damage.

What Is a Brick Backsplash and Why Does It Get Dirty Differently

Brick is porous. That single fact changes everything about how you clean it compared to tile, glass, or stainless steel.

Standard clay brick absorbs between 12% and 20% of its weight in water, according to the Clay Brick Association. Handmade or historic brick can reach porosity levels around 35%. So when cooking grease hits an unsealed brick surface, it doesn’t just sit there. It soaks in.

This is the opposite of what happens with a glazed ceramic backsplash, where grease beads up and wipes off. With brick, the porous surface pulls oil, smoke residue, and moisture deep into the material. That’s why a brick backsplash behind your stove can look permanently stained after just a few months of heavy cooking, if you don’t stay on top of it.

Real Brick, Brick Veneer, and Faux Brick Panels

Not all brick backsplashes are the same material, and the type you have changes the cleaning approach completely.

Real brick: Full-depth clay brick, often found in older homes with exposed interior walls. Heaviest, most porous, and hardest to clean when stains set in.

Brick veneer: Thin slices of real clay brick (usually 0.5 to 1 inch thick) mounted to cement backer board. Popular in newer kitchens where homeowners want the look without the structural weight. Cleaning is similar to full brick, but you need to be gentler with scrubbing since the pieces are thinner.

Faux brick panels: Polyurethane or PVC panels molded to look like brick. These aren’t porous at all. A damp cloth and mild dish soap handles most cleaning. Don’t use TSP or heavy chemical cleaners on faux panels because they can warp or discolor the material.

Knowing which type you have matters before you reach for any cleaning product. I’ve seen people go at faux panels with a stiff bristle brush and trisodium phosphate solution, only to ruin the surface texture. Check first.

Sealed vs. Unsealed Brick

Here’s where it gets tricky. A sealed brick backsplash has a protective coating (penetrating sealer or topical sealer) that blocks moisture and grease from entering the pores. Unsealed brick has zero protection.

Sealed brick is far easier to maintain. Spills stay on the surface longer, giving you time to wipe them up before they absorb. Unsealed brick will soak up cooking grease within minutes.

You can test yours by sprinkling a few drops of water on the surface. If the water beads up, the brick is sealed. If it darkens and absorbs quickly, you’re dealing with unsealed brick. This test takes 10 seconds and tells you exactly which cleaning method to follow.

Common Dirt Types on Kitchen Brick

Kitchen brick collects specific types of grime, and each one needs a slightly different approach.

• Cooking grease: The most common problem. Oil splatter from frying, sauteing, and roasting builds up fast, especially on brick directly behind the stove
• Smoke and soot residue: Builds up gradually from gas burners and high-heat cooking
• Hard water stains: White mineral deposits from steam and water splashes near the sink
• Mold in grout lines: The mortar joints between bricks trap moisture and organic matter, creating conditions for mold and mildew growth
• Efflorescence: White powdery deposits caused by salts migrating through the brick as moisture evaporates

Tools and Supplies for Cleaning Brick Backsplash

Get everything together before you start. Stopping mid-clean to hunt for a brush while a baking soda paste dries on your backsplash is not fun.

The 2025 Houzz Home Study found that 86% of kitchen renovations include backsplash updates. But plenty of homeowners skip routine maintenance between remodels, and that’s where damage accumulates. The right tools make regular cleaning quick enough that you’ll actually do it.

Brushes and Cloths

Nylon-bristle brush is your primary tool. Not wire. Wire brushes tear up mortar joints and scratch brick surfaces. A medium-stiffness nylon brush handles most scrubbing without damage.

Grab a few microfiber cloths for wiping and rinsing. Old cotton rags leave lint behind in the brick texture, and paper towels fall apart too fast on rough surfaces.

An old toothbrush or dedicated grout brush is needed for cleaning mortar joints. The narrow head fits between bricks where a larger brush can’t reach. Took me years to figure out that the grout lines need their own separate scrub session. They always do.

Cleaning Agents by Job Type

Keep spray bottles handy for the vinegar solution and soapy water mix. A drop cloth or painter’s tape protects your countertops and adjacent surfaces from drips and chemical splashes during deeper cleaning sessions.

What Not to Buy

Skip the oven cleaners. Seriously. Harsh chemical oven sprays can permanently discolor brick, and some contain lye that eats into mortar joints.

Don’t buy a pressure washer for indoor brick. It’s overkill, it makes a mess, and the force can blast mortar right out of the joints. Save that for your exterior brick or your driveway.

How to Clean Sealed Brick Backsplash

Sealed brick is the easier job. The sealant creates a barrier between the porous brick surface and whatever your kitchen throws at it (grease, steam, tomato sauce). Most sealed brick backsplashes only need a routine wipe-down and occasional deeper cleaning.

Routine Cleaning Method

Start with a dry brush. Run a nylon-bristle brush over the entire backsplash to knock off loose dust, crumbs, and surface debris. Do this before introducing any liquid. Wet dust turns into mud in the brick texture, which is harder to remove than the original dust.

Mix a few drops of dish soap into warm water. Not hot, not cold. Warm. Dip a microfiber cloth into the solution, wring it out so it’s damp (not soaking), and wipe the brick surface in sections.

Rinse with a separate clean, damp cloth. Don’t flood the surface. With sealed brick, excess water can pool behind the sealant layer and potentially cause issues over time. Damp is enough.

This takes about 10 minutes for an average kitchen backsplash. Do it weekly if you cook regularly on the stove directly below the brick.

Removing Grease Stains from Sealed Brick

Baking soda paste is your best friend here.

Mix baking soda and water to a thick, spreadable consistency (think toothpaste). Apply it directly to the grease stain. Let it sit for 10 to 15 minutes. The baking soda draws the oil out of the surface layer.

Scrub with a nylon brush in small circular motions. Wipe clean with a damp microfiber cloth.

For stubborn grease that doesn’t budge on the first try, spray the stain with a mix of equal parts dish soap and white vinegar before applying the baking soda paste. The combination cuts through heavier buildup. But you rarely need this on properly sealed brick because the grease shouldn’t have penetrated deep.

If you’re dealing with a kitchen that leans toward an industrial design with a lot of exposed brick, grease stains tend to show up faster because the surface area near cooking zones is larger. Stay on top of spot cleaning so it doesn’t accumulate.

How to Clean Unsealed Brick Backsplash

Unsealed brick is a different situation. Water alone can push stains further into the material because there’s nothing blocking absorption. You have to be more deliberate about what you use and how you apply it.

According to the Clay Brick Association, historic or handmade brick can have a porosity value around 35%, meaning over a third of the brick’s structure is open pore space. That’s a lot of surface area for grease and grime to hide in.

Step-by-Step Cleaning for Unsealed Brick

Step 1: Dry brush the entire surface. This is even more critical on unsealed brick than sealed. You’re removing every loose particle before any liquid touches the surface.

Step 2: Mix a diluted vinegar cleaning solution. Equal parts white vinegar and water in a spray bottle. Mist the brick surface lightly. Don’t drench it.

Step 3: Scrub with a nylon-bristle brush, working in small sections. Wipe each section with a clean damp cloth immediately after scrubbing.

Step 4: For areas with visible grease, apply the baking soda paste method (same as above) and let it sit for 15 minutes before scrubbing.

One thing worth mentioning. If your mortar is limestone-based, skip the vinegar entirely. Acidic cleaners dissolve limestone mortar. Use the dish soap and warm water method instead, even if it takes more effort.

When to Use Trisodium Phosphate (TSP)

TSP is the heavy hitter. It handles grease and smoke damage that gentler cleaners can’t touch.

Bob Vila describes TSP as effective on brick and stone surfaces where other cleaners fail. The standard ratio is half a cup of TSP per two gallons of warm water.

But you need to take precautions seriously. Wear rubber gloves, eye protection, and work in a ventilated area. TSP has been banned or restricted in some states because of its environmental impact on waterways, so check local regulations before purchasing.

Apply with a nylon brush, scrub the stained areas, and rinse thoroughly with clean water. Don’t let TSP sit on the surface for extended periods.

And here’s something most guides don’t tell you: after a deep clean with TSP on unsealed brick, you should strongly consider applying a penetrating sealer. Otherwise you’ll be back in the same situation within months. Unsealed brick in a kitchen without a sealer is just asking for repeat problems.

How to Clean Grout Lines on Brick Backsplash

The grout lines (mortar joints) between bricks get dirty in ways the brick face doesn’t. Grout sits recessed from the brick surface, creating tiny channels where moisture, grease, and food particles collect. Mold loves these spots.

Mold and Mildew in Grout

Hydrogen peroxide is the go-to here. Mix hydrogen peroxide with baking soda to form a paste, apply directly to the affected mortar joints, and let it sit for 10 minutes.

Scrub with a grout brush or old toothbrush. The bristles need to be stiff enough to agitate the mold but not so stiff they gouge the mortar.

Do not mix hydrogen peroxide with vinegar. The combination creates peracetic acid, which can irritate skin and lungs. Use one or the other, never both in the same cleaning session.

When Grout Needs More Than Cleaning

Sometimes the problem isn’t dirt. It’s damage.

If the mortar is crumbling, cracking, or pulling away from the brick, cleaning won’t fix it. That’s a repointing job. Repointing means removing the deteriorated mortar and filling the joints with fresh mortar. It’s common in older brick installations, and it’s something you’ll want a professional to handle if you aren’t experienced with masonry work.

Grout that looks permanently discolored even after a thorough deep clean likely needs resealing. A grout sealer creates a protective barrier that prevents future staining. Applying grout to a backsplash correctly the first time prevents a lot of these issues, but if the original job wasn’t sealed, you can still fix it retroactively.

Signs your grout needs attention beyond basic cleaning:

• Mortar crumbles when you press it with your finger
• Dark stains remain after multiple cleaning attempts
• Water soaks into the grout line instantly instead of beading

How to Remove Specific Stains from Brick Backsplash

General cleaning handles the everyday grime. But specific stains need targeted methods. Using the wrong approach wastes time or, worse, makes the stain permanent.

Hard Water Stains

Those white, chalky deposits near the sink are mineral buildup from evaporated water. Spray white vinegar directly on the stain, let it sit for 5 minutes, and wipe with a damp cloth.

Repeat if needed. Hard water stains are stubborn but they respond well to acidity. Just remember the limestone mortar warning from earlier.

Mold and Mildew

Apply hydrogen peroxide directly to the affected area. Don’t dilute it for spot treatment. Let it bubble and work for about 10 minutes, then scrub with a nylon brush.

For recurring mold, the issue is usually moisture. A kitchen range hood that properly vents steam away from the backsplash reduces mold problems significantly. If you’re noticing mold coming back in the same spots repeatedly, look at your ventilation before you keep scrubbing.

Smoke and Soot

Chemical sponge first. A dry chemical sponge (sometimes called a soot sponge) lifts smoke residue without smearing it deeper into the brick. Wipe in straight lines, don’t scrub in circles.

If residue remains after the sponge pass, move to a TSP solution. This is one of TSP’s strongest use cases, as sources like This Old House and Bob Vila note it handles accumulated soot on masonry surfaces better than most alternatives.

Efflorescence

Those white powdery deposits on the brick surface are salts that migrate through the material as moisture evaporates. Dry brush first. Often that’s enough for mild cases.

For persistent efflorescence, diluted muriatic acid is a last resort. Use extreme caution: dilute heavily, wear full protective gear, and test on a small inconspicuous area first. Muriatic acid can damage colored brick and certain mortars.

Paint Splatters

Careful scraping with a plastic putty knife removes most dried paint without scratching the brick. Don’t use a metal scraper because it will leave marks on the surface.

For paint that won’t budge, a small amount of paint solvent on a cloth can help. Test in a hidden spot first. Solvent can discolor some sealers. If you’ve been doing any painting around a red brick wall, protecting the brick with drop cloths during the job saves you from this headache entirely.

The texture of the brick is part of its appeal. Aggressive stain removal methods that flatten or smooth the surface defeat the purpose of having a brick backsplash in the first place. When deciding between the look of natural, slightly imperfect brick and a perfectly clean surface, sometimes you’re better off living with a faint mark than destroying the character of the material.

Cleaning Methods to Avoid on Brick Backsplash

Wrong cleaning methods cause more damage than the original stain. Brick is tough but not indestructible, and the mortar joints between bricks are even more vulnerable.

Wire Brushes and Abrasive Tools

Wire brushes scratch the brick face and tear apart mortar joints. The scratches create new channels where grease and dirt collect, making future cleaning harder.

Stick with nylon-bristle brushes for all brick backsplash scrubbing. They’re stiff enough to agitate grime without gouging the surface. If a nylon brush can’t remove a stain, the answer is a stronger cleaning agent, not a more aggressive brush.

Pressure Washers Indoors

Never use a pressure washer on an interior brick backsplash. The force blasts mortar out of joints, pushes water deep into the wall cavity behind the brick, and creates a massive mess in your kitchen.

Even on low settings, the water volume is too much for an indoor porous brick surface. A damp microfiber cloth does what a pressure washer does, just slower and without the collateral damage.

Undiluted Acids and Harsh Chemicals

Undiluted vinegar on limestone-based mortar dissolves it. Full-strength muriatic acid can discolor brick permanently. Oven cleaners containing lye eat into mortar joints and leave residue that’s nearly impossible to rinse out of a porous surface.

The rule is simple. Always dilute. Always test a small hidden area first. And if you’re not sure what type of mortar you have (Portland cement vs. limestone), default to the gentlest cleaning method available.

If you’re pairing your brick backsplash with green kitchen cabinets, the last thing you want is chemical splash damaging nearby cabinet finishes. Cover adjacent surfaces with drop cloths and painter’s tape during any deep cleaning session.

How to Seal Brick Backsplash After Cleaning

Cleaning without sealing is a half-finished job. You’ll be right back where you started within a few months, especially on unsealed brick in a kitchen environment where grease and steam are constant.

Prosoco notes that most brick sealer treatments last 3 to 7 years under typical conditions, with reapplication cycles depending on the sealer chemistry and exposure level. Kitchen backsplashes, which face daily heat and grease, sit on the shorter end of that range.

Drying Time Before Sealing

Wait 24 to 48 hours after cleaning before applying any sealer. The brick needs to be completely dry.

Applying sealer to damp brick traps moisture inside the pores. That trapped moisture causes blotching, discoloration, and in some cases, the sealer won’t bond properly at all. Patience here saves you from redoing the entire job.

Penetrating Sealer vs. Topical Sealer

For a kitchen backsplash, penetrating sealers are usually the better choice. They don’t change the look of the brick, they let moisture vapor escape, and they won’t peel or flake. Real Thin Brick notes that penetrating sealers can last over 20 years before reapplication on some surfaces, though kitchen environments with daily grease exposure will shorten that.

Topical sealers give a shinier finish, which some people prefer. But they wear off faster in high-use areas and can make the brick look plasticky if applied too thick. Acrylic topical sealers specifically need resealing every 1 to 3 years, according to brick sealer comparison data.

Application Method

Thin coats are the rule. Apply with a foam roller or a natural-bristle brush, working in small sections. Two thin coats beat one thick coat every time.

Let the first coat dry fully before adding the second. Rough brick surfaces with deep pores may need extra product worked into the recesses with a brush. Don’t rush it.

If you’re working on a farmhouse-style kitchen, the matte finish of a penetrating sealer keeps that raw, organic feel intact. A glossy topical sealer on rustic brick looks out of place in most cases.

How Often to Clean Brick Backsplash

A maintenance schedule prevents stains from becoming permanent. Most people wait too long between cleanings, then wonder why baking soda paste and scrubbing can’t fix what months of neglected grease buildup have done.

The 2024 Houzz Kitchen Trends Study shows that countertops and backsplashes are the most commonly updated kitchen elements during renovations. Keeping your brick backsplash clean between remodels extends its life and delays the need for replacement.

Weekly Maintenance

Sealed brick behind the stove: Wipe down with a damp microfiber cloth after heavy cooking sessions. A quick pass takes under 2 minutes.

Once a week, do a full wipe of the entire backsplash surface with warm soapy water. This prevents grease from accumulating to the point where you need a deep clean.

Monthly Cleaning

A slightly deeper pass with dish soap solution and a nylon-bristle brush. Pay attention to grout lines and any areas directly behind burners where splatter concentrates.

Inspect the mortar joints for early signs of mold or mildew. Catching it early means a quick hydrogen peroxide treatment instead of a full scrub-down later.

Seasonal Deep Clean and Inspection

Every 3 to 4 months, do a thorough deep clean of the entire brick backsplash, including grout treatment.

This is also when you check the sealant. Do the water drop test: sprinkle water on the brick surface. If it absorbs within seconds instead of beading, the sealer is wearing off and needs reapplication. In a kitchen with daily cooking, sealant breakdown happens faster than in other rooms.

Your kitchen lighting matters here. Good task lighting above the backsplash area helps you spot grease buildup and grout discoloration that you’d miss under dim ambient light. Install or angle your under-cabinet lights to illuminate the brick surface during cleaning sessions.

Brick Backsplash Cleaning Products Compared

Not every product works equally well. And some products marketed as “brick cleaners” are either too weak for kitchen grease or too harsh for interior use. Here’s what actually performs, based on real product formulations and use cases.

DIY Solutions

Baking soda paste: The safest and cheapest option. Mix with water to a thick consistency. Best for spot-treating grease on sealed brick. Costs almost nothing.

White vinegar spray: Equal parts vinegar and water. Good for hard water stains and light grime. Not safe on limestone mortar.

Dish soap mix: A few drops of dish soap in warm water. The daily workhorse for routine maintenance. Nothing fancy, just effective.

These three cover about 80% of kitchen brick cleaning needs. Most homeowners never need to go beyond them if they stay on a regular cleaning schedule.

Commercial Products

Zep Heavy-Duty Citrus Degreaser is a popular choice for kitchen grease removal. It’s restaurant-grade, uses natural citrus solvents (d-limonene), and Home Depot reviewers note it handles heavy grease well, though stubborn buildup may require multiple applications. Test on an inconspicuous area first, as Zep’s label warns against use on natural stone.

Krud Kutter’s Driveway Cleaner and Degreaser contains a proprietary “Oil Grabber” additive that penetrates porous surfaces like brick and masonry to dissolve grease. It’s biodegradable, water-based, and works on both sealed and unsealed surfaces.

Products to Skip Entirely

Bleach-based cleaners on interior brick are a bad idea. Bleach can discolor the brick face, and on colored grout, it fades the pigment permanently.

Acid-based tile cleaners designed for ceramic or porcelain should never touch brick mortar. They eat into Portland cement and destroy limestone mortar joints. If the label says “for tile and grout” but doesn’t mention masonry or brick specifically, leave it on the shelf.

And those “magic eraser” melamine sponges? They work on smooth surfaces but they’re useless on textured brick. The rough surface shreds the sponge instantly, leaving white residue stuck in every crevice. Learned that one the hard way.

If you’re budgeting for your overall backsplash costs, keep in mind that routine cleaning with inexpensive DIY solutions is far cheaper than replacing damaged brick or hiring a professional for restoration work that could have been prevented with basic maintenance.

FAQ on How To Clean Brick Backsplash

What is the best homemade cleaner for brick backsplash?

A baking soda paste mixed with water works best for grease stains. For general cleaning, use a few drops of dish soap in warm water. White vinegar spray handles hard water deposits, but skip it if your mortar is limestone-based.

Can you use vinegar to clean brick backsplash?

Yes, but only on brick with Portland cement mortar. Dilute white vinegar equally with water. Never use vinegar on limestone mortar because the acid dissolves it. Always test a small hidden area first.

How often should you clean a brick backsplash in the kitchen?

Wipe sealed brick weekly with a damp cloth. Do a deeper clean with soap and a nylon-bristle brush monthly. Every 3 to 4 months, do a full deep clean including grout line treatment and sealant inspection.

How do you remove grease from unsealed brick?

Dry brush first to remove loose debris. Apply a thick baking soda paste directly to the grease stain and let it sit for 15 minutes. Scrub with a nylon brush. For heavy buildup, use a diluted TSP solution with proper ventilation.

Is it safe to use TSP on a brick backsplash?

TSP (trisodium phosphate) is effective on brick for heavy grease and smoke damage. Mix half a cup per two gallons of warm water. Wear rubber gloves and eye protection. Check local regulations first because TSP is restricted in some states.

Do you need to seal brick backsplash after cleaning?

Strongly recommended, especially for unsealed brick. A penetrating sealer blocks grease and moisture from entering the pores. Wait 24 to 48 hours after cleaning for the brick to dry completely before applying sealer.

What should you never use to clean brick backsplash?

Avoid wire brushes, pressure washers, undiluted acids, and oven cleaners. Bleach-based products discolor brick and fade colored grout. Acid-based tile cleaners designed for ceramic destroy mortar joints on brick surfaces.

How do you clean mold from brick backsplash grout lines?

Apply a paste of hydrogen peroxide and baking soda directly to the affected mortar joints. Let it sit for 10 minutes, then scrub with a grout brush. Never mix hydrogen peroxide with vinegar in the same session.

What is the white powder forming on my brick backsplash?

That’s efflorescence, which is salts migrating through the brick as moisture evaporates. Dry brush the surface first. For stubborn deposits, use diluted muriatic acid as a last resort, testing on a hidden spot before full application.

Can you clean a faux brick backsplash the same way as real brick?

No. Faux brick panels made from polyurethane or PVC aren’t porous. A damp cloth with mild dish soap is all you need. Don’t use TSP, stiff brushes, or chemical cleaners because they can warp or discolor the material.

Conclusion

Learning how to clean brick backsplash comes down to matching the right method to your specific brick type. Sealed brick needs a simple dish soap routine. Unsealed brick demands more care with baking soda paste or a diluted trisodium phosphate solution for stubborn buildup.

The mortar joints between bricks need their own attention. Hydrogen peroxide handles mold. A grout brush reaches where wider brushes can’t.

Don’t skip the sealer. A penetrating brick sealer applied after deep cleaning prevents grease absorption and cuts your future maintenance time significantly.

Stay on a weekly wipe-down schedule. Spot clean food splatter immediately. Do a seasonal deep clean with grout inspection. That’s the entire system.

Your brick backsplash will look better and last longer with consistent, gentle care rather than occasional aggressive scrubbing sessions.

• Author
• Recent Posts

Andreea Dima

Andreea Dima is a certified interior designer and founder of AweDeco, with over 13 years of professional experience transforming residential and commercial spaces across Romania. Andreea has completed over 100 design projects since 2012. All content on AweDeco is based on her hands-on design practice and professional expertise.

Latest posts by Andreea Dima (see all)

• What Color Bedding Goes with Gray Walls - May 14, 2026
• What Color Curtains Go With Gray Walls - May 8, 2026
• How Visual Furniture Previews Help You Choose the Right Piece for Your Room - April 13, 2026