Updated:May, 2026

10 Best Outdoor Mold Removal of 2026

Best Choice

9.9

Outstanding

Wet & Forget

Wet & Forget Moss, Mold, Mildew, & Algae Stain Remover Multi-Surface Outdoor Cleaner Concentrate, Original, 128 Fluid Ounces

Why We Love It

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 forget
Surfaces including driveway, patio, roof, siding, deck, vinyl, wood, concrete, canvas, aluminum, and upholstery
Mix 1 part Wet & Forget with 5 parts water in a garden sprayer, spray dry surface on a cool day to avoid rapid evaporation of product, do not rinse, apply when rain is not forecasted within 4-5 hours
Apply when the temperature is above 32° F; unused product can be stored mixed and ready in sprayer for future applications
Cleans with the wind and rain, green stains clean up within 1-2 weeks, black stains or heavy, stubborn stains can take several months, long-established stains may take 6-12 months; surfaces can stay clean up to 1 year or longer

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Why We Love It

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 forget
Surfaces including driveway, patio, roof, siding, deck, vinyl, wood, concrete, canvas, aluminum, and upholstery
Mix 1 part Wet & Forget with 5 parts water in a garden sprayer, spray dry surface on a cool day to avoid rapid evaporation of product, do not rinse, apply when rain is not forecasted within 4-5 hours
Apply when the temperature is above 32° F; unused product can be stored mixed and ready in sprayer for future applications
Cleans with the wind and rain, green stains clean up within 1-2 weeks, black stains or heavy, stubborn stains can take several months, long-established stains may take 6-12 months; surfaces can stay clean up to 1 year or longer

How We Find the Top Picks

We use smart data tools to review thousands of products and stores, analyzing ratings, reviews, and popularity trends to highlight what truly matters to shoppers like you.

Our experts then refine the results, blending AI insights with real user experiences to deliver accurate, up-to-date rankings that help you choose with confidence.

9.5

Excellent

Wet & Forget

Wet & Forget Outdoor Moss, Mold, Mildew, & Algae Stain Remover Multi-Surface Cleaner, Ready to Use, 64 Ounce

Main Highlights

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 including, porch steps, headstones, fountains, planters, concrete, canvas, and upholstery
Use attached sprayer apply generously to dry surface on a cool day to avoid rapid evaporation of product, do not rinse, apply when rain is not forecasted within 4-5 hours, apply when the temperature is above 32° F
Cleans over time with the wind and rain, green stains clean up within 1-2 weeks, black stains or heavy, stubborn stains can take several months, long-established stains may take 6-12 months; surfaces can stay clean up to 1 year or longer
It is bleach free and non-acidic; spray 100 feet away from lakes, ponds, rivers, and streams and flush plants with water before and after application
Each bottle treats 60 to 180 square feet; heavy stained and porous surfaces will absorb more product

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Main Highlights

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 including, porch steps, headstones, fountains, planters, concrete, canvas, and upholstery
Use attached sprayer apply generously to dry surface on a cool day to avoid rapid evaporation of product, do not rinse, apply when rain is not forecasted within 4-5 hours, apply when the temperature is above 32° F
Cleans over time with the wind and rain, green stains clean up within 1-2 weeks, black stains or heavy, stubborn stains can take several months, long-established stains may take 6-12 months; surfaces can stay clean up to 1 year or longer
It is bleach free and non-acidic; spray 100 feet away from lakes, ponds, rivers, and streams and flush plants with water before and after application
Each bottle treats 60 to 180 square feet; heavy stained and porous surfaces will absorb more product

9.5

Excellent

30 SECONDS

30 SECONDS Pro Mold and Mildew Stain Remover | Scrub Free | Brighter Results Instantly | Ready To Use | 32 Fl. Oz.

Main Highlights

Use In Bathroom Tile and Grout, Bathtub, Soap Scum, Showers, Drywall, Wood, Fences, Decks, Vinyl Sidng, Concrete Floors, Kitchen, Brick Walls, and other areas where mold and mildew can grow
NO SCRUBBING REQUIRED: Avoid the hassle and backbreaking work of scrubbing tough stains
2X STRONGER FORMULA: 2X Stronger than 30 SECONDS Outdoor Cleaner
BRIGHTER RESULTS INSTANTLY: Noticeably brightens surfaces, removing mold and mildew stains as you watch
REMOVES BLACK MOLD STAINS & MORE

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Main Highlights

Use In Bathroom Tile and Grout, Bathtub, Soap Scum, Showers, Drywall, Wood, Fences, Decks, Vinyl Sidng, Concrete Floors, Kitchen, Brick Walls, and other areas where mold and mildew can grow
NO SCRUBBING REQUIRED: Avoid the hassle and backbreaking work of scrubbing tough stains
2X STRONGER FORMULA: 2X Stronger than 30 SECONDS Outdoor Cleaner
BRIGHTER RESULTS INSTANTLY: Noticeably brightens surfaces, removing mold and mildew stains as you watch
REMOVES BLACK MOLD STAINS & MORE

9.2

Excellent

30 SECONDS

30 SECONDS Outdoor Cleaner 2 Pack with Hose End Sprayer - Cleans Stains from Algae, Mold and Mildew on Vinyl Siding, Deck, Patio, Brick and More

Main Highlights

CLEANS STAINS CAUSED BY ORGANIC GROWTH: 30 SECONDS Outdoor Cleaner rapid cleans stains caused by algae, mold, mildew and moss
Safe 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 you would like to clean and hose off! No more pressure washing
EFFECTIVE FOR MULTIPLE SURFACES: Works great on wood decks, concrete sidewalks, asphalt driveways, brick walls, most canvas awnings, plastic outdoor furniture, vinyl siding & more!

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Main Highlights

CLEANS STAINS CAUSED BY ORGANIC GROWTH: 30 SECONDS Outdoor Cleaner rapid cleans stains caused by algae, mold, mildew and moss
Safe 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 you would like to clean and hose off! No more pressure washing
EFFECTIVE FOR MULTIPLE SURFACES: Works great on wood decks, concrete sidewalks, asphalt driveways, brick walls, most canvas awnings, plastic outdoor furniture, vinyl siding & more!

9.0

Excellent

Wet & Forget

Wet & Forget Outdoor Moss, Mold, Mildew, & Algae Stain Remover Multi-Surface Cleaner, Xtreme Reach Hose End with New & Improved Nozzle, 48 Fluid Ounces

Main Highlights

New & Improved Nozzle! Xtreme Reach Hose End Outdoor Cleaner attaches to garden hose; jet tip sprays up to 30ft to remove green and black stains caused by moss, mold, mildew, and algae on roofs and siding; fan tip provides quick application to driveways and decks; no rinsing
Spray dry surface on a cool day to avoid rapid evaporation of product, do not rinse, apply when rain is not forecasted within 4-5 hours, apply when the temperature is above 55° F
Cleans over time with the wind and rain, green stains clean up within 1-2 weeks, black stains or heavy, stubborn stains can take several months, long-established stains may take 6-12 months; surfaces can stay clean up to 1 year or longer
It is bleach free and non-acidic; spray 100 feet away from lakes, ponds, rivers, and streams and flush plants with water before and after application
Each bottle treats up to 2,000 square feet, heavy stained and porous surfaces will absorb more product

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Main Highlights

New & Improved Nozzle! Xtreme Reach Hose End Outdoor Cleaner attaches to garden hose; jet tip sprays up to 30ft to remove green and black stains caused by moss, mold, mildew, and algae on roofs and siding; fan tip provides quick application to driveways and decks; no rinsing
Spray dry surface on a cool day to avoid rapid evaporation of product, do not rinse, apply when rain is not forecasted within 4-5 hours, apply when the temperature is above 55° F
Cleans over time with the wind and rain, green stains clean up within 1-2 weeks, black stains or heavy, stubborn stains can take several months, long-established stains may take 6-12 months; surfaces can stay clean up to 1 year or longer
It is bleach free and non-acidic; spray 100 feet away from lakes, ponds, rivers, and streams and flush plants with water before and after application
Each bottle treats up to 2,000 square feet, heavy stained and porous surfaces will absorb more product

8.8

Very Good

Home Armor

Home Armor Outdoor Cleaner Concentrate, 1 gal., Remove Stains from Mold, Mildew, Algae, Dirt and Grime for Visible Results in Seconds, No Scrubbing Required, Plant Safe

Main Highlights

REMOVE TOUGH STAINS: Home Armor Pressure Wash Concentrate blasts away stains from dirt, grime, algae, mold and mildew with professional strength.
2X CLEANING POWER of ordinary outdoor cleaners. The Refill Cleaning Cartridge contains super-concentrated cleaning tablets in an easy-to-use cartridge refill system.
VISIBLE RESULTS IN SECONDS: This Home Armor outdoor cleaner delivers visible results, cleaning and brightening a variety of different surfaces in seconds.
MULTI-SURFACE OUTDOOR CLEANER that's ideal for use on brick, wood, concrete and vinyl. Do not use on cedar or redwood that is less than 2 years old and avoid contact with metal surfaces, clothing, carpet, fabrics, floor coverings or vegetation.
DIRECTIONS FOR USE: Attach hose to bottle, ensure it is in the "OFF" position. Turn water on and rinse surrounding plants with water. Turn to "CLEAN" or "CLEAN+" and spray surface. Wait 10 minutes and then rinse surface and surrounding plants again.

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Main Highlights

REMOVE TOUGH STAINS: Home Armor Pressure Wash Concentrate blasts away stains from dirt, grime, algae, mold and mildew with professional strength.
2X CLEANING POWER of ordinary outdoor cleaners. The Refill Cleaning Cartridge contains super-concentrated cleaning tablets in an easy-to-use cartridge refill system.
VISIBLE RESULTS IN SECONDS: This Home Armor outdoor cleaner delivers visible results, cleaning and brightening a variety of different surfaces in seconds.
MULTI-SURFACE OUTDOOR CLEANER that's ideal for use on brick, wood, concrete and vinyl. Do not use on cedar or redwood that is less than 2 years old and avoid contact with metal surfaces, clothing, carpet, fabrics, floor coverings or vegetation.
DIRECTIONS FOR USE: Attach hose to bottle, ensure it is in the "OFF" position. Turn water on and rinse surrounding plants with water. Turn to "CLEAN" or "CLEAN+" and spray surface. Wait 10 minutes and then rinse surface and surrounding plants again.

8.6

Very Good

Home Armor

Home Armor Outdoor Cleaner+, 64 oz., Remove Stains from Mold, Mildew, Algae, Dirt and Grime for Visible Results in Seconds, No Scrubbing Required, Plant Safe When Used as Directed

Main Highlights

REMOVE TOUGH STAINS: Home Armor Outdoor Cleaner+ powers away dirt, grime, algae, mold and mildew stains. No scrubbing required.
VISIBLE RESULTS IN SECONDS: This Home Armor outdoor cleaner delivers efficient, visible results, cleaning and brightening a variety of different surfaces in seconds. Remove mold and algae stains, dirt and grime from outdoor surfaces.
CUSTOMIZABLE HOSE END: Home Armor Outdoor Cleaner+ features a customizable sprayer for ultimate convenience. Remove dirt and debris for a cleaner surface.
MULTI-SURFACE OUTDOOR CLEANER that's ideal for use on brick, wood, concrete and vinyl. Do not use on cedar or redwood that is less than 2 years old and avoid contact with metal surfaces, clothing, carpet, fabrics, floor coverings or vegetation.
DIRECTIONS FOR USE: Attach hose to bottle, ensure it is in the "OFF" position. Turn water on and rinse surrounding plants with water. Turn to "CLEAN" or "CLEAN+" and spray surface. Wait 10 minutes and then rinse surface and surrounding plants again.

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Main Highlights

REMOVE TOUGH STAINS: Home Armor Outdoor Cleaner+ powers away dirt, grime, algae, mold and mildew stains. No scrubbing required.
VISIBLE RESULTS IN SECONDS: This Home Armor outdoor cleaner delivers efficient, visible results, cleaning and brightening a variety of different surfaces in seconds. Remove mold and algae stains, dirt and grime from outdoor surfaces.
CUSTOMIZABLE HOSE END: Home Armor Outdoor Cleaner+ features a customizable sprayer for ultimate convenience. Remove dirt and debris for a cleaner surface.
MULTI-SURFACE OUTDOOR CLEANER that's ideal for use on brick, wood, concrete and vinyl. Do not use on cedar or redwood that is less than 2 years old and avoid contact with metal surfaces, clothing, carpet, fabrics, floor coverings or vegetation.
DIRECTIONS FOR USE: Attach hose to bottle, ensure it is in the "OFF" position. Turn water on and rinse surrounding plants with water. Turn to "CLEAN" or "CLEAN+" and spray surface. Wait 10 minutes and then rinse surface and surrounding plants again.

8.3

Very Good

30 SECONDS

30 SECONDS Outdoor Cleaner Dirt,Mold & Mildew Cleaner & Stain Remover Concentrate | 1 Gallon

Main Highlights

REMOVES STAINS FROM ORGANIC GROWTH ON YOUR OUTDOOR SURFACES: 30 SECONDS Outdoor cleaner cleans stains from mold, mildew, dirt and grime
POWERFUL CONCENTRATED FORMULA: Our concentrated formula is easy use. Simply mix a 1:1 ratio with water and you are ready for a rapid clean
IMMEDIATE RESULTS ON A VARIETY OF OUTDOOR SURFACES: Works on many outdoor surfaces including decks, composite and stained surfaces. Concrete, bricks and masonry. Gutters, siding, canvas, plastic and stucco. Fences, arbors and painted surfaces. You can see results immediately!
PLANT AND LAWN SAFE: When used as directed, 30 SECONDS outdoor cleaner is safe to use around landscaping, plants, and your lawn. The formula breaks down once rinsed into the soil.

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Main Highlights

REMOVES STAINS FROM ORGANIC GROWTH ON YOUR OUTDOOR SURFACES: 30 SECONDS Outdoor cleaner cleans stains from mold, mildew, dirt and grime
POWERFUL CONCENTRATED FORMULA: Our concentrated formula is easy use. Simply mix a 1:1 ratio with water and you are ready for a rapid clean
IMMEDIATE RESULTS ON A VARIETY OF OUTDOOR SURFACES: Works on many outdoor surfaces including decks, composite and stained surfaces. Concrete, bricks and masonry. Gutters, siding, canvas, plastic and stucco. Fences, arbors and painted surfaces. You can see results immediately!
PLANT AND LAWN SAFE: When used as directed, 30 SECONDS outdoor cleaner is safe to use around landscaping, plants, and your lawn. The formula breaks down once rinsed into the soil.

8.1

Very Good

RMR Brands

RMR-86 Instant Mold and Mildew Stain Remover Spray - Scrub Free Formula, 1 Gallon

Main Highlights

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 mold and mildew
USING RMR-86: To safely and conveniently eliminate indoor mold and mildew stains and odors using RMR-86, proper ventilation and PPE should be used for each application
SAFE TO USE ON MULTIPLE SURFACES: Easily remove stubborn stains from decks, wood, vinyl siding, drywall, concrete floors, brick walls, kitchen surfaces, and other areas where mold and mildew tend to grow
FAST-ACTING SPRAY: Our powerful, fast-acting mold stain remover spray begins working instantly to target deeply embedded stains that linger on surfaces and hard-to-reach areas
NO SCRUBBING NEEDED: Simply spray our ready-to-use formula on the affected area and watch the stains disappear right before your eyes!

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Main Highlights

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 mold and mildew
USING RMR-86: To safely and conveniently eliminate indoor mold and mildew stains and odors using RMR-86, proper ventilation and PPE should be used for each application
SAFE TO USE ON MULTIPLE SURFACES: Easily remove stubborn stains from decks, wood, vinyl siding, drywall, concrete floors, brick walls, kitchen surfaces, and other areas where mold and mildew tend to grow
FAST-ACTING SPRAY: Our powerful, fast-acting mold stain remover spray begins working instantly to target deeply embedded stains that linger on surfaces and hard-to-reach areas
NO SCRUBBING NEEDED: Simply spray our ready-to-use formula on the affected area and watch the stains disappear right before your eyes!

8.1

Very Good

RMR Brands

RMR Brands DIY Mold & Stain Remover Bundle, Complete Mold Killer & Mildew Prevention Kit, Disinfectant Spray, Includes 2-32 fluid ounce Bottles

Main Highlights

TWO FAST-ACTING FORMULAS: The ultimate mold prevention kit, our bundle includes 1 spray bottle of RMR-86 and 1 spray bottle of RMR-141 RTU to kill mold and mildew instantly while lifting difficult stains that are left behind
KILL MOLD AND MILDEW INSTANTLY: Our RMR-141 Disinfectant Spray Cleaner and Fungicide kills harmful molds and mildews, and prevents regrowth by completely eliminating the roots that other sprays often leave behind
REMOVE STUBBORN STAINS IN SECONDS: Our RMR-86 Instant Mold & Mildew Stain Remover begins working immediately to target stubborn stains that linger on surfaces and hard-to-reach areas
NO SCRUBBING NEEDED: Simply spray our ready-to-use formulas on the affected area and watch the mold and mildew disappear right before your eyes!
SAFE TO USE ON MULTIPLE SURFACES: Use this powerful duo on wood decks, concrete floors, brick walls, carpeted areas, kitchen tiles, and any space where mold and mildew tend to grow

Check Price

Main Highlights

TWO FAST-ACTING FORMULAS: The ultimate mold prevention kit, our bundle includes 1 spray bottle of RMR-86 and 1 spray bottle of RMR-141 RTU to kill mold and mildew instantly while lifting difficult stains that are left behind
KILL MOLD AND MILDEW INSTANTLY: Our RMR-141 Disinfectant Spray Cleaner and Fungicide kills harmful molds and mildews, and prevents regrowth by completely eliminating the roots that other sprays often leave behind
REMOVE STUBBORN STAINS IN SECONDS: Our RMR-86 Instant Mold & Mildew Stain Remover begins working immediately to target stubborn stains that linger on surfaces and hard-to-reach areas
NO SCRUBBING NEEDED: Simply spray our ready-to-use formulas on the affected area and watch the mold and mildew disappear right before your eyes!
SAFE TO USE ON MULTIPLE SURFACES: Use this powerful duo on wood decks, concrete floors, brick walls, carpeted areas, kitchen tiles, and any space where mold and mildew tend to grow

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