The porous surface of brick makes it a magnet for soot, efflorescence, mold, and ground-in grime that ordinary household cleaners simply cannot lift. A dedicated formula or tool is required to penetrate the tiny pores and release deeply embedded stains without causing surface damage.
I’m Mohammad Maruf — the founder and writer behind WellFizz. I’ve spent countless hours analyzing chemical compositions, application methods, and real-world user feedback specifically on masonry and brick restoration products to help you cut through the marketing and find what actually works on fired clay and concrete block.
After reviewing dozens of formulas and brushing attachments, I’ve narrowed the field to the five most effective solutions for restoring the original look of your home’s masonry. You are now reading my thoroughly researched guide to the best cleaner for bricks.
How To Choose The Best Cleaner For Bricks
Brick is a durable but porous material. The wrong cleaner can leave a white chalky residue, etch the surface, or fail to lift deep stains. Understanding a few key factors will steer you to the right product for your specific mess.
Match the Cleaner Chemistry to the Stain Type
Organic stains like mold, mildew, and algae require an oxidizing formula that breaks down biological matter at the root — look for peroxide-based or bleach-free options. Soot and creosote from fireplaces calls for a surfactant-rich spray that emulsifies sticky, carbon-based residue. Grease and oil on a brick patio or garage wall demands an alkaline degreaser that can saponify fats. Using the wrong chemistry simply pushes the stain deeper into the brick.
Consider the Application Method: Spray vs. Scrub
Some cleaners are designed to be sprayed on and rinsed off with no scrubbing, ideal for large vertical walls or delicate vintage brick. Others require mechanical agitation with a stiff brush or a drill-powered brush attachment to break the bond between the stain and the masonry. A no-scrub formula saves time but may require multiple applications on heavy staining; a brush-based system gives you more control on stubborn spots but adds physical work.
Check Coverage and Concentration
Brick cleaning projects are rarely small. A gallon of concentrated cleaner that dilutes to several usable gallons is far more economical for covering a 200-square-foot patio or a two-story chimney. Pre-mixed spray bottles work well for quick touch-ups on a fireplace surround or a single wall section. Always calculate the square footage you need to treat before choosing a bottle size.
Quick Comparison
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| Model | Category | Best For | Key Spec | Amazon |
|---|---|---|---|---|
| RMR-86 Instant Mold & Mildew Stain Remover | Stain Remover | No-scrub mold removal on brick walls | Per-gallon coverage ~300 sq ft | Amazon |
| Drillbrush Red Stiff Nylon Bristle Brush Set | Scrub Tool | Mechanical scrubbing of brick with drill | Included 4-inch round flat brush | Amazon |
| CLR PRO Bleach-Free Mold & Mildew Stain Remover | Cleaner | Bleach-free mildew removal on painted brick | 1-gallon ready-to-use bottle | Amazon |
| Rust-Oleum Quick Prep 3-in-1 Cleaner | Degreaser & Etch | Prepping brick for paint or sealant | Covers up to 250 sq ft per gallon | Amazon |
| Hearth & Stove Glass Cleaner | Soot Remover | Fireplace soot and creosote on brick | 12-ounce spray | Amazon |
In‑Depth Reviews
1. RMR-86 Instant Mold and Mildew Stain Remover
RMR-86 is a professional-strength, no-scrub spray that targets deeply embedded mold and mildew stains on porous brick surfaces. The formula begins working on contact, oxidizing organic discoloration at the molecular level without the need for mechanical abrasion. Multiple customer reports confirm it can remove black mold staining from brick walls and concrete floors with just a spray and rinse, even on old, neglected surfaces.
Users consistently note that the fumes are extremely potent — this is not a gentle bathroom spray. Full PPE including a respirator, goggles, and chemical-resistant gloves is mandatory. The product continues working up to 24 hours after application, so a second application can tackle any residual spots. The gallon size provides extensive coverage for large brick projects like basement walls or exterior siding.
One reviewer successfully used it on a bounce house, which speaks to its versatility on fabric and vinyl, but its real strength lies in masonry. A few users mention it bleaches fabric instantly on contact, so protect any surrounding materials. The spray nozzle is convenient, but the bottle should be stored with the original screw cap to prevent leaks.
Why it’s great
- Removes mold stains instantly with zero scrubbing
- Powerful enough for deep brick pores and concrete
- One gallon covers hundreds of square feet
Good to know
- Extremely strong fumes require full PPE
- Can bleach fabrics and some surfaces on contact
- Multiple applications may be needed on heavy staining
2. Drillbrush Red Stiff Nylon Bristle Brush Set
This is not a liquid cleaner — it is a mechanical scrubbing system that attaches to any standard cordless drill to turn it into a high-torque brick scrubber. The set includes a 4-inch round flat brush, a crevice brush, and a smaller detail brush, all with stiff red nylon bristles designed to hold up against concrete, brick, and stone without falling apart. One user reported cleaning decades-old brickwork under a gas range using water, baking soda, and dish detergent with excellent results.
The stiff bristles are less aggressive than wire brushes, which means they will not scratch or gouge the brick face or mortar joints. This makes them ideal for preparing brick walls for painting or sealant application. One reviewer used this set to scrub a brick wall before painting and noted the brushes held up well through the entire project. The 4-inch brush covers flat surfaces efficiently, while the crevice brush reaches into mortar lines and corners.
The kit includes a 90-day return window from the manufacturer. Keep in mind that the drill is not included, and users recommend a drill with at least 18V of power for sustained scrubbing. For cleaning large brick patios or entire house siding, this tool dramatically reduces the physical effort compared to a hand brush.
Why it’s great
- Dramatically reduces scrubbing effort on brick surfaces
- Stiff nylon bristles clean without damaging brick
- Versatile set for mortar lines and flat areas
Good to know
- Requires a drill (not included)
- Less effective on baked-on grease without chemical aid
- Bristles are stiff but not as hard as wire
3. CLR PRO Bleach-Free Mold & Mildew Stain Remover
CLR PRO offers a gentler approach to mold and mildew removal on brick and painted masonry. The bleach-free formula is certified through the EPA Safer Choice program, meaning it contains no phosphates, ammonia, or bleach, yet still effectively lifts organic stains. Users have reported success on brick, concrete, and painted walls, noting it works well on newer mold spots and reduces larger old growth areas with overnight application.
This cleaner shines on surfaces where you cannot risk bleaching the color out of the brick or damaging a painted finish. It is also safe to use on hardwood floors, baseboards, and fabrics, which makes it a versatile household cleaner beyond just brick. The 1-gallon bottle is ready-to-use and covers a large area. Application is straightforward — spray, wait 25-30 seconds, and wipe or rinse.
Some users note it is less effective on heavy rust stains on concrete or deep-set black mold that has been growing for years. In those cases, multiple applications or a more potent oxidizer may be needed. The lack of strong fumes makes it a better choice for indoor cleaning where ventilation is limited, but it will require light scrubbing for embedded stains.
Why it’s great
- Bleach-free formula safe for painted brick
- EPA Safer Choice certified
- Mild fumes suitable for indoor use
Good to know
- Less effective on deep, old mold growth
- May require multiple applications
- Does not remove rust stains on concrete
4. Rust-Oleum Quick Prep 3-in-1 Cleaner Degreaser and Etch
Rust-Oleum Quick Prep is a 3-in-1 formula that cleans, degreases, and etches bare brick and concrete in a single step. It is specifically designed as a surface preparation product for coatings, paints, and stains. The etching action opens the pores of the masonry to promote maximum adhesion, which is critical if you plan to paint or seal your brick wall or patio. One user cleaned a 14-year-old garage floor with years of oil and grease buildup and reported excellent results before applying a Rust-Oleum Rocksolid coating.
The formula is safe near grass and vegetation, making it suitable for outdoor brick patios, driveways, and walkways. It covers up to 250 square feet per gallon, and the ready-to-use liquid requires no dilution. Application requires brushing or rolling, and the surface must be rinsed thoroughly afterward. Users recommend using a stiff brush or the Drillbrush set above for deep penetration into the brick texture.
Some reviewers note it does not foam heavily and requires physical effort with a heavy brush for the best results. It is not a general-purpose stain remover for organic growth — it is a prep cleaner for concrete and brick that are getting a new coating. If you are not planning to paint or seal, a different product may suit your needs better.
Why it’s great
- Cleans, degreases, and etches in one application
- Essential for paint and sealant adhesion on brick
- Safe near grass and vegetation
Good to know
- Requires scrubbing; not a spray-and-rinse formula
- Not designed for organic stain removal
- Best used as a prep step, not a standalone cleaner
5. Hearth & Stove Glass Cleaner
Despite its name, this cleaner is highly effective on brick surrounding fireplaces and wood stoves. The formula is a surfactant-based spray that cuts through soot, creosote, and black carbon deposits that accumulate on masonry around the firebox. One reviewer noted it brings soot and creosote to the surface of the bricks, allowing you to wipe it away with a damp towel. Another user confirmed that stubborn black marks on fireplace glass edges came off after letting the spray sit for a few minutes.
The 12-ounce spray bottle is compact and convenient for small projects like a fireplace surround or a single section of brick wall. The product is biodegradable, which is a plus for indoor use where you may not want harsh chemicals dispersing into the air. Users report that most of the soot comes off easily, while baked-on residue may require a razor blade on glass or a second application on brick.
Some customers recommend buying multiple bottles for a heavily used fireplace, as the small size can run out quickly on large projects. It does not work as a general-purpose masonry cleaner — it is purpose-built for carbon-based soot and creosote. If your brick is stained by mold, grease, or general grime, you will need one of the other products in this guide.
Why it’s great
- Specifically formulated for soot and creosote on brick
- Biodegradable formula safe for indoor use
- Lifts soot to the surface with minimal scrubbing
Good to know
- Small 12-ounce bottle — buy multiple for big jobs
- Less effective on mold, grease, or general grime
- Baked-on residue may still need a second application
FAQ
Can I use bleach on brick to remove mold?
How do I remove white efflorescence from brick?
Is it safe to pressure wash brick after using a chemical cleaner?
Will a drill brush attachment damage my brick?
Final Thoughts: The Verdict
For most users, the best cleaner for bricks winner is the RMR-86 Instant Mold & Mildew Stain Remover because it removes deep-set organic stains without any scrubbing, saving hours of labor on vertical brick walls. If you need a bleach-free option safe for painted brick, grab the CLR PRO Bleach-Free Mold & Mildew Stain Remover. And for heavy soot buildup around a fireplace, nothing beats the Hearth & Stove Glass Cleaner.
Mo Maruf
I created WellFizz to bridge the gap between vague wellness advice and actionable solutions. My mission is simple: to decode the research and give you practical tools you can actually use.
Beyond the data, I am a passionate traveler. I believe that stepping away from the screen to explore new environments is essential for mental clarity and physical vitality.