If you're battling stubborn mold and mildew on your concrete surfaces, you're not alone. Many homeowners struggle with this issue, which often arises from excessive moisture. But don’t worry – the best concrete cleaner for mold and mildew is here to help! These specially formulated products will not only remove tough stains but also prevent future growth. Whether you're dealing with driveways, patios, or basements, the right cleaner can restore your surfaces and protect them for months to come. Say goodbye to the frustration of scrubbing endlessly and embrace a cleaner, healthier outdoor space. With the best options available, you'll be able to tackle the job with confidence.
Wet & Forget Concentrate Outdoor Cleaner removes green and black stains caused by moss, mold, mildew, and algae, no scrubbing, no rinsing, no pressure washing, just wet it and forgetSurfaces including driveway, patio, roof, siding, deck, vinyl, wood, concrete, canvas, aluminum, and upholsteryMix 1 p
Key specs
- Cleaning Timeline
- Green growth clears in 1 to 2 weeks, while stubborn black mold stains take several months or up to a full year to lift with natural rainfall.
- Application Method
- Mix 1 part concentrate with 5 parts water in a garden pump sprayer and apply to dry concrete on a cool day without rinsing.
Pros:
- Requires no scrubbing, rinsing, or pressure washing after application
- Dilutes at a 1 to 5 ratio with water to yield substantial cleaning volume
- Surfaces can remain clean for up to 1 year or longer after treatment
- Unused mixed solution can be stored in the garden sprayer for later use
Cons:
- Black or heavy concrete stains can take several months or up to a full year to clear
- Requires 4 to 5 hours of dry conditions above 32 degrees Fahrenheit before rainfall
TACKLES TOUGH MOLD STAINS INSTANTLY: RMR-86 PRO is our most powerful mold stain remover that utilizes special deep penetrating surfactants with a unique hybrid of pure sodium hypochlorite to remove stubborn stains in just seconds.CONTRACTOR GRADE: Our extra strength stain removal solution is specifi
Key specs
- Active Chemistry
- Hybrid pure sodium hypochlorite with surfactants
- Action Speed
- Penetrates deep into porous surfaces to dissolve stubborn mold and mildew stains within seconds of direct contact.
Pros:
- Fast-acting sodium hypochlorite formula dissolves mold stains in seconds
- Ready-to-use contractor-grade liquid requires no measuring or dilution
- Penetrates deep into porous concrete without requiring scrubbing or sanding
- Formulated specifically to address heavy mold stains from flood damage
Cons:
- High-strength chemical formulation requires protective gear and careful handling
- Does not provide ongoing residual protection to prevent mold from returning
CLEANS AND BRIGHTENS IN MINUTES: Blast away dirt, mold and algae stains with Mold Armor E-Z House Wash. Your siding will look bright and new – no ladder or scrubbing required. Cleans up to 4,500 sq. ft.POWERFUL CLEANING ACTION: This house cleaner removes dirt while killing stains down to the roots.
Key specs
- Coverage Area
- Up to 4,500 sq ft per 64 oz bottle
- Foam Dwell Time
- Microban foaming solution clings to concrete surfaces for 10 minutes before requiring a thorough water rinse.
Pros:
- Includes an integrated hose-end adapter for rapid broad-area spraying
- Treats up to 4,500 square feet directly from the 64-ounce container
- Microban foaming formula clings to vertical masonry and flat concrete
- Requires only a 10-minute dwell time before rinsing off with a garden hose
Cons:
- Must be rinsed thoroughly with water after 10 minutes to finish cleaning
- Bottle configuration requires a garden hose and cannot be poured into a pump sprayer
Cleans a wide variety of surfaces such as wood, composite, vinyl, metal, fabric, plastic, wicker, concrete, stone, brick and asphaltLifts dirt, grime and stains from mold, mildew, Moss and algaeUses the power of peroxide to lift grime without harsh chemicalsProduct container may vary from image show
Key specs
- Application Equipment
- Pressure washer chemical injector
- Label Verification
- Check the container label to confirm pressure washer injection ratios and specific concrete dwell instructions before use.
Pros:
- Formulated specifically for use through outdoor pressure washer chemical systems
- Supplied in a 1-gallon bulk jug to cover extensive exterior concrete areas
- Utilizes the Oxy Solve formula designed for total outdoor cleaning jobs
Cons:
- Requires an operational pressure washer with detergent injection capability
- Coverage area and dwell recommendations are not listed and must be checked on label
CLEANS STAINS CAUSED BY ORGANIC GROWTH: 30 SECONDS Outdoor Cleaner rapid cleans stains caused by algae, mold, mildew and mossSafe For Lawn and Plants: When used as directed, 30 Seconds Outdoor Cleaner will not harm your lawn, trees, shrubs, or landscaping.EASY TO USE: Just spray on to the surface yo
Key specs
- Landscape Safety
- Will not harm lawns, trees, shrubs, or surrounding landscaping when applied strictly according to label directions.
- Package Format
- Two 64 fl oz bottles with hose-end sprayers
Pros:
- Supplied as a two-pack of 64-ounce bottles with integrated hose-end sprayers
- Will not harm lawns, trees, shrubs, or landscaping when used as directed
- Cleans stains from mold, mildew, algae, and moss without pressure washing
- Works on multiple exterior surfaces including concrete sidewalks and driveways
Cons:
- Requires direct water rinsing from a garden hose rather than natural weathering
- Application reach is restricted by the length of the attached garden hose
Wet & Forget Ready To Use Outdoor Cleaner comes with a high-capacity trigger sprayer for quick application to smaller surfaces; removes green and black stains caused by moss, mold, mildew, and algae, no scrubbing, no rinsing, no pressure washing, just wet it and forget it on multiple surfaces includ
Key specs
- Spot Coverage
- 60 to 180 sq ft per 64 oz bottle
- Chemical Composition
- Bleach-free and non-acidic
- Environmental Precaution
- Keep spray at least 100 feet away from lakes, ponds, and streams, and flush surrounding plants with water before and after application.
Pros:
- Pre-diluted formula is ready to use immediately without measuring or mixing
- Comes with an attached high-capacity trigger sprayer for convenient spot treatment
- Bleach-free and non-acidic formula avoids harsh chemical runoff
- Cleans progressively with wind and rain to keep concrete clear up to 1 year
Cons:
- Treats only 60 to 180 square feet per 64-ounce bottle
- Must be sprayed at least 100 feet away from lakes, ponds, rivers, and streams
GET RID OF STUBBORN MOLD AND MILDEW STAINS: Our instant spray cleaner removes the stains left behind from black mold and mildew. They tend to leave behind ugly staining that can go deep below the surface; Our professional-strength spray is specifically formulated to eliminate discoloration caused by
Key specs
- Safety Requirements
- Requires proper personal protective equipment and adequate ventilation to handle the strong active fumes safely.
- Ready Formula
- Ready-to-use 1-gallon liquid (no dilution)
Pros:
- Fast-acting spray formula begins dissolving mold stains on contact
- Removes deeply embedded black mold discoloration without scrubbing
- Ready-to-use liquid eliminates the need for dilution tanks or measuring cups
- Neutralizes stubborn mold and mildew odors alongside visible stains
Cons:
- Requires protective gear and adequate ventilation during application
- Supplied in a bulk 1-gallon jug without an included trigger sprayer or applicator
Powerful clean: This powerful foam spray removes tough stains from tile, showers, bathroom surfaces, tents, hardwood floors, hard plastics, automobile tires, wood, grout and fiberglassFast-acting: Quickly remove tough surface stains. This bleach-free remover has a foam sprayer that allows for a more
Key specs
- Environmental Certification
- EPA Safer Choice certified
- Dispenser Style
- Foaming trigger sprayer clings to vertical and porous surfaces to maximize contact time without splashing.
Pros:
- Earned the EPA Safer Choice certification for bleach-free mold stain removal
- Foaming trigger sprayer clings to surfaces and helps prevent chemical splash-back
- Safe on concrete, brick, painted surfaces, hardwood, tile, and outdoor fabrics
- Convenient two-pack provides two 32-ounce spray bottles for targeted cleaning
Cons:
- Targeted foaming spray is inefficient for treating large concrete driveways
- Requires manual wiping or rinsing instead of self-cleaning with rainfall
Fast and Effective: ACTIVE Seal & Grout Stain Remover is a Powerful Whitening Deep Cleaner. Mildew Stain Remover has an Instant Effect in Minutes to Quickly Clean Mold Stain and Eliminate Unwanted Musty Dirt and GrimeWide Range of Use: Efficient Cleaning for Rubber Gasket, Front Loading Laundry Drum
Key specs
- Formulation Consistency
- High-viscosity clinging gel
- Target Application
- Formulated specifically for narrow crevices, rubber seals, shower caulk, and indoor grout joints rather than open concrete pads.
Pros:
- Thick gel consistency clings firmly to vertical seams, grout lines, and caulk
- Deep-cleaning formula targets concentrated mildew stains in high-moisture joints
- Narrow squeeze dispenser allows pinpoint application directly on stained seals
Cons:
- Formulated specifically for washing machine seals, caulk, and grout rather than broad concrete
- Compact 7-fluid-ounce volume is far too small for driveways or large patios
Last update on 2025-10-07 / Affiliate links / Images, Product Titles, and Product Highlights from Amazon Product Advertising API
If you've ever found yourself frustrated with stubborn green and black stains on your driveway, patio, or roof, Wet & Forget Moss, Mold, Mildew, & Algae Stain Remover might just be the solution you've been waiting for. This unique cleaner stands out in the crowded market of outdoor cleaners due to its simple yet effective approach to eliminating moss, mold, mildew, and algae stains. No scrubbing, no pressure washing—just spray and forget.
One of the key features of Wet & Forget is its ease of use. Instead of the usual exhausting scrub-and-rinse routine, this cleaner lets the rain and wind do the hard work for you. All you need to do is mix one part of the cleaner with five parts water, apply it to a dry surface using a garden sprayer, and let nature take its course. It’s a hassle-free process that fits into any homeowner’s busy lifestyle, saving you time and energy while still achieving stellar results.
Why Wet & Forget Stands Out
Unlike other concrete cleaners that require constant attention and repeated applications, Wet & Forget uses a more passive approach. Its non-abrasive formula is designed to clean using the natural elements—wind and rain. Within 1 to 2 weeks, you'll notice green stains from moss or algae beginning to fade. For stubborn black stains or mold, Wet & Forget works its magic over a few months, making it a reliable solution for long-term maintenance.
Another impressive advantage is the versatility of the cleaner. Whether you're dealing with a wooden deck, vinyl siding, concrete driveway, or even canvas furniture, Wet & Forget does the job on multiple surfaces. You won’t need separate cleaners for every material in your yard. From your roof to your upholstery, Wet & Forget is designed to be effective on various outdoor surfaces, making it a go-to for homeowners who want to tackle all their cleaning needs with one product.
Long-Term Effectiveness and Easy Maintenance
What truly sets Wet & Forget apart is its lasting effects. Once applied, surfaces can stay clean for up to a year or longer, providing a long-term solution to a problem that often requires frequent upkeep. This is especially beneficial for people who struggle to keep up with constant cleaning maintenance. Rather than needing a fresh application every few weeks, this cleaner significantly reduces the frequency of reapplications, giving you more time to enjoy your outdoor spaces.
However, while the product excels in many areas, it’s important to note that Wet & Forget’s results are gradual. For those who need immediate gratification, this cleaner might feel a bit too slow. Heavy, long-established stains can take up to 6 to 12 months to fully disappear, which may be frustrating for some users. Patience is key with Wet & Forget—it requires time, but the results are well worth the wait.
The Convenience Factor
A standout benefit of this product is the ability to apply it on your own schedule. You don’t need to be concerned about rinsing or pressure washing, which often leads to water waste and extra effort. Instead, Wet & Forget works best on cool days with no rain in the forecast for 4-5 hours, giving it the perfect window to work its magic. Once sprayed, you can forget about it—literally. It’s one of the most convenient and least labor-intensive outdoor cleaners available.
Moreover, Wet & Forget can be stored in the sprayer for future applications, making it easy to keep the cleaner ready when you need it. This flexibility makes it an ideal choice for busy homeowners who don’t have the time to clean every weekend.
Eco-Friendly Cleaning
What sets Wet & Forget apart from other harsh chemical-based cleaners is its eco-friendly nature. Because it works with rain and wind, it reduces the need for excessive water usage and harmful chemical runoff, making it a sustainable choice for those who are conscious of their environmental footprint. By choosing Wet & Forget, you’re not only protecting your concrete, wood, and vinyl surfaces but also contributing to a cleaner, greener environment.
In conclusion, Wet & Forget Moss, Mold, Mildew, & Algae Stain Remover is a solid choice for anyone looking to clean and maintain their outdoor surfaces with minimal effort. Whether you’re dealing with stubborn stains on your driveway or moldy roof tiles, this product provides a unique and convenient solution. Its gradual yet effective cleaning process, combined with long-lasting results, makes it a standout in the market of outdoor cleaners.
RMR-86 Pro Instant Mold Stain & Mildew Stain Remover stands as a high-performance solution that takes mold and mildew removal to a whole new level. Designed primarily for professional use, this product offers contractors and homeowners a robust option for tackling even the toughest stains in a fraction of the time. With its ultra-strength formula, RMR-86 Pro promises to save both time and effort, allowing you to see immediate results without any scrubbing or sanding. Whether you’re cleaning wood, concrete, or brick walls, it guarantees the removal of stubborn mold and mildew stains, even after flooding or other natural disasters.
Pros:
- Instant Results: One of the standout features of RMR-86 Pro is its ability to remove tough mold and mildew stains in just seconds. This makes it a perfect solution for those who need immediate results without the hassle of multiple applications or strenuous scrubbing.
- Contractor Grade Strength: It’s 5x stronger than most typical mold removers on the market, making it an ideal choice for heavy-duty cleaning tasks in attics, crawlspaces, or after flood damage.
- Ready-to-Use Formula: Unlike some other cleaners that require mixing, RMR-86 Pro is ready to use straight out of the bottle. This feature simplifies the cleaning process, allowing for quick application and immediate results.
- Versatile Application: From drywall to decks, this mold stain remover is safe to use on a variety of surfaces. Its versatility makes it a go-to choice for anyone looking to address mold and mildew in multiple areas of their home or business.
Cons:
- Strong Odor: Due to the high strength formula, the odor can be overwhelming, especially for those sensitive to chemicals. While the product does work fast, the scent may linger in poorly ventilated areas, which could be a downside for indoor use.
- Heavy Duty Cleaning: While the product excels at tackling stubborn stains, it may be overkill for lighter, everyday mold issues. For homeowners with just minor mold problems, the potent formula might not be necessary and could lead to unnecessary chemical exposure.
- Not Ideal for Smaller Jobs: Since it is intended for professional use, RMR-86 Pro may be too strong for some casual users who just need a mild cleaner for small mold and mildew problems. Its strength could be intimidating for those unfamiliar with such heavy-duty products.
Key Features:
RMR-86 Pro isn’t just another mold and mildew cleaner; it’s a professional-grade powerhouse designed to take on even the most stubborn stains. Utilizing pure sodium hypochlorite, the product works quickly to break down mold, mildew, and other stubborn stains without the need for scrubbing. This makes it a valuable tool for anyone looking to save time on tough cleaning jobs, especially in large areas or after flood damage.
Mold Armor 64 oz. E-Z House Wash is a game-changer when it comes to tackling tough stains on concrete, brick, and various other outdoor surfaces. Designed to clean and brighten your house in minutes, this product promises a hassle-free solution for homeowners who want to get rid of dirt, mold, algae, and other stubborn stains. It’s a cleaner that doesn’t require a ladder or scrubbing, offering a quick and easy fix for any surface that has seen the wear and tear of weather and time.
With the ability to cover up to 4,500 sq. ft., Mold Armor is perfect for large homes or commercial spaces. The hose-end adapter makes it even more convenient, allowing you to simply spray the cleaner onto your surface and watch it work. The Microban foaming technology provides a deep, long-lasting clean by lifting dirt and debris, while also targeting mold and algae at the root.
Pros:
- Time-Saving Solution: Mold Armor cleans and brightens in minutes, offering an incredibly fast solution for tackling mold and mildew stains without needing hours of scrubbing or ladder work. Just spray it on, wait for 10 minutes, and rinse.
- Wide Surface Compatibility: The product is designed to be safe for use on various surfaces, including vinyl, brick, stucco, aluminum, concrete, and even painted wood. Whether it’s your driveway, house siding, or trim, Mold Armor works effectively across a range of materials.
- Long-Lasting Clean: Thanks to the Microban foaming technology, the product doesn’t just remove dirt on the surface; it clings to surfaces and lifts dirt and debris, leaving behind a clean that lasts.
- Coverage and Efficiency: With the ability to clean up to 4,500 sq. ft., Mold Armor is perfect for large areas, saving you both time and money in the long run. Whether it’s a sprawling house or a big outdoor space, this cleaner can tackle the job in one go.
Cons:
- Requires Rinsing: While the product is effective, it does require you to rinse off after 10 minutes, which could be an inconvenience for some, especially if you're dealing with hard-to-reach spots or areas with limited water access.
- Potential for Overuse: While it’s great for larger areas, using too much of the product on smaller sections may feel excessive, especially if you only need to target a few stains. It might not be the most economical choice for minor cleaning tasks.
- Surface Sensitivity: While it’s safe for a variety of surfaces, certain delicate materials might still react differently, so it's crucial to test on a small area before full application to ensure compatibility.
Key Features:
Mold Armor 64 oz. E-Z House Wash uses an impressive combination of Microban foaming technology and powerful cleaning action that tackles tough stains right at the root. Unlike many other cleaners that only address surface stains, this product goes deeper, lifting debris and preventing future buildup. The no-scrub, no-ladder design makes it an easy and efficient choice for homeowners, even those with large properties. Whether you need to clean siding, concrete, or gutters, Mold Armor provides an effective, long-lasting solution that reduces the need for frequent reapplication.
Simple Green Oxy Solve Total Outdoor Pressure Washer Cleaner is a highly versatile and eco-friendly cleaner that takes on tough stains and grime without the harsh chemicals found in many other products. Whether you're tackling mold, mildew, or algae on concrete, stone, brick, or even wicker, this cleaner makes the job easy, lifting stains with the power of peroxide. The bonus? Every purchase helps support BISSELL Pet Foundation, which aids in the rescue of homeless pets. A cleaner with a cause!
This outdoor cleaner offers an effective solution for those looking to remove mold and mildew stains from various surfaces without resorting to toxic chemicals. From wood to composite, and even plastic and vinyl, it’s safe for multiple materials, making it a fantastic choice for homeowners with diverse outdoor surfaces.
Pros:
- Eco-Friendly and Safe: Unlike many cleaners that use harsh chemicals, this product relies on the power of peroxide to lift grime, making it a safer choice for both your surfaces and the environment. Plus, it’s pet-friendly, supporting BISSELL Pet Foundation, which rescues homeless pets with every purchase.
- Effective on Multiple Surfaces: Whether you're dealing with concrete, wood, stone, or even plastic, Simple Green Oxy Solve does it all. It tackles a wide variety of surfaces, making it perfect for homeowners with multiple types of outdoor materials that need cleaning.
- Fast-Acting and Powerful: With its peroxide-based formula, this cleaner doesn't just mask stains—it lifts dirt, grime, and stains quickly and efficiently. Mold, mildew, moss, and algae don’t stand a chance. A quick spray is all it takes, and you’re left with clean surfaces in no time.
- Pressure Washer Friendly: Designed specifically for use with pressure washers, this cleaner ensures maximum efficiency when paired with the right equipment, making large outdoor jobs even quicker.
Cons:
- Container Variability: One downside to consider is that the product container may vary from what is shown in the images, which could cause some confusion for buyers expecting a specific bottle design. However, the product inside remains the same.
- Mild Scent: While the formula is generally considered safe and effective, some users may find the scent of the peroxide cleaner to be slightly strong. It’s not overwhelming, but it may linger during use, which might not appeal to everyone.
- Pressure Washer Required: While the cleaner works great with a pressure washer, those without access to such equipment may not experience the same level of efficiency and convenience. The cleaning power is optimized for use with pressure washers, so it may require additional elbow grease when applied manually.
Key Features:
Simple Green Oxy Solve Total Outdoor Pressure Washer Cleaner doesn’t just remove surface stains; it gets to the root of the problem. The peroxide-based formula works by lifting and breaking down grime, stains, and dirt caused by mold, mildew, moss, and algae, leaving surfaces looking fresh and clean without the need for harsh chemicals. Whether you're cleaning your concrete driveway, vinyl fence, or stone patio, this cleaner tackles it all with ease, ensuring a thorough clean while maintaining the integrity of your surfaces. And with its eco-friendly approach, it's a win-win for both your home and the planet.
30 SECONDS Outdoor Cleaner is a powerful, yet easy-to-use cleaner designed to eliminate tough stains caused by mold, mildew, and algae. If you've been struggling with unsightly stains on your vinyl siding, concrete, or wooden deck, this product promises to provide a quick and hassle-free solution. The best part? There's no need for a pressure washer—just spray, wait a bit, and rinse!
This cleaner is specially formulated for homeowners who want an effective and eco-friendly way to tackle outdoor stains. With a hose-end sprayer included in the pack, cleaning your driveway, patio, or even your canvas awnings has never been easier. Plus, it's safe for your lawn, shrubs, and trees when used as directed, making it a top choice for anyone with extensive outdoor landscaping.
Pros:
- Easy to Use: One of the standout features of this cleaner is how simple it is to use. No need for elaborate steps—just spray it on the affected areas and rinse it off. It's that easy! For those who find the pressure washing process too much of a hassle, this cleaner offers an instant alternative without the need for specialized equipment.
- Versatile Application: This product works wonders on a wide range of surfaces, from vinyl siding to asphalt driveways, brick walls, and wooden decks. Whether you're cleaning patios, plastic outdoor furniture, or canvas awnings, 30 SECONDS Outdoor Cleaner has got you covered. It’s a great all-in-one solution for various outdoor cleaning needs.
- Safe for Plants: A major concern for homeowners when using cleaning products near landscaping is whether the product will harm their plants. With this cleaner, you don’t have to worry. When used as directed, it’s safe for lawns, trees, and shrubs, making it a great choice for those with lush gardens and landscaping.
- Quick Results: 30 SECONDS Outdoor Cleaner works fast. In just 30 seconds of application, you'll notice the grime and stains start to dissolve, leaving your surfaces cleaner and brighter. No more waiting hours for results, and no more scrubbing with elbow grease—just spray, rinse, and see the transformation.
Cons:
- Short Waiting Time May Vary: While this product is advertised as working in 30 seconds, the reality is that some tough stains may require a bit more time. If the mold or algae buildup is particularly stubborn, you might need to reapply and wait a bit longer for the best results.
- Limited to Certain Stains: While it excels at removing organic stains like algae, mold, mildew, and moss, this cleaner may not be as effective on grease stains or oil-based residues. For homeowners facing a wider variety of stains, a more specialized product may be needed for some specific tasks.
- Potential for Overuse: While easy to apply, it’s important to follow the instructions carefully to avoid overuse. Using too much cleaner on a smaller surface or too frequently can result in wasting product or causing unwanted side effects, especially if the surface is already relatively clean.
Key Features:
The 30 SECONDS Outdoor Cleaner is a standout when it comes to outdoor stain removal. Easy to use with no need for additional tools, it allows homeowners to take care of their outdoor cleaning needs without spending hours on maintenance. The hose-end sprayer makes application a breeze, and with rapid stain removal powered by algae, mold, and mildew-fighting ingredients, this cleaner truly delivers.
What makes it even better is that it’s safe for plants—a key feature that puts it ahead of harsher chemical alternatives. Plus, it works on an impressive range of surfaces. Whether you’re cleaning wooden decks, vinyl, or even brick walls, 30 SECONDS Outdoor Cleaner does the job without any pressure-washing headaches, making it an essential tool for anyone looking to maintain their outdoor spaces effortlessly.
