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2.5 Gal. Outdoor Cleaner Concentrate

  • Tough-acting algae, mildew and mold remover
  • Ideal for decks, driveways, sidewalks, brick walls and stucco
  • Simply spray and hose off for a noticeably clean surface
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Product Overview

30 SECONDS Outdoor Cleaner Concentrate cleans stains on all outdoor surfaces

30 SECONDS Outdoor Cleaner Concentrate

Clean stains from Algae, Mold and Mildew off virtually all outdoor surfaces without a pressure washer. The Original and still the best outdoor cleaner since 1977, proudly made in the USA.

30 SECONDS Outdoor Cleaner Concentrate safe around plants, lawns, and landscaping

Safe Around Plants, Lawns and Landscaping

30 SECONDS Outdoor Cleaner is specially formulated to break down readily in the soil, so you don’t have to worry about the rinse water harming your plants. Foliage that is sprayed directly with the cleaner should be rinsed within ten minutes.

30 SECONDS Outdoor Cleaner Concentrate starts working in 30 seconds

Starts Working in 30 SECONDS

Our fast-acting Outdoor Cleaner really does start working in just 30 SECONDS! Follow the soak time on the bottle based on the porosity of the surface and level of staining. 1 gallon of concentrate cleans 200 to 600 square feet.

30 SECONDS Outdoor Cleaner Concentrate safe to use on a variety of outdoor surfaces

Safe to Use on A Variety of Outdoor Surfaces

From Asphalt, Shingles to the Concrete Driveway and everything in between. With 30 SECONDS Outdoor Cleaner, its clean when YOU want it clean!

30 SECONDS Outdoor Cleaner Concentrate step 1

Step 1

Ideally, work on a cool, overcast day. Mix the cleaner 50/50 in a tank sprayer. 1 gallon of concentrate makes 2 gallons of ready to use product.

30 SECONDS Outdoor Cleaner Concentrate step 2

Step 2

Start with a dry surface. Thoroughly saturate to clean stains from Algae, Mold and Mildew and wipe out Dirt and Grime.

30 SECONDS Outdoor Cleaner Concentrate step 3

Step 3

Let the cleaner soak for the time listed on the bottle. During that time a second application of cleaner may be needed to keep the surface wet. Areas of heavy staining may need additional soak time or a quick brush. Then, simply rinse with a garden hose.

30 SECONDS Outdoor Cleaner Concentrate cleans vinyl and painted metal surfaces

Cleans Vinyl and Painted Metal Surfaces

Safe to use on painted surfaces, siding, fences, lanais, pool cages, gutters, awnings, fiberglass, mobile homes and RV roofs.

30 SECONDS Outdoor Cleaner Concentrate use on natural or composite wood

Use on Natural or Composite Wood

Natural wood such as hardwoods, cedar or pine as well as composite decks, fences, porches, siding and log cabins.

30 SECONDS Outdoor Cleaner Concentrate great for concrete and asphalt

Great for Concrete and Asphalt

Effectively cleans porous surfaces like driveways, sidewalks, asphalt shingles, stucco, brick, natural and manmade stone, masonry, pavers and patios.

30 SECONDS Outdoor Cleaner Concentrate perfect for everything outdoors

Perfect for Everything Outdoors

Clean planters, pots, garden décor, green houses, mailboxes and more without harming plants and landscaping.

30 SECONDS Outdoor Cleaner Concentrate use for outdoor fabrics and awnings

Outdoor Fabrics and Awnings

Spray on and hose off stains on outdoor awnings, carpets, tarps, tents, cushions, and umbrellas.

30 SECONDS Outdoor Cleaner Concentrate restores the like new appearance

Restore that Like New Appearance

Patio furniture, chairs, tables, benches, play equipment and pool float will all look good as new.

30 Seconds Cleaners are the Original and still the best Outdoor Cleaners since 1977 when you need to remove stains from Algae, Mold and Mildew or KILL Lichen and Moss. No need for noisy, expensive Pressure Washers with 30 Seconds Cleaners. For a Fast Acting, Instant Clean that wipes out Dirt & Grime, you will want the Original 30 Seconds Outdoor Cleaner. Simply spray on, brush if needed, and rinse away stains from Algae, Mold, and Mildew. Safe around your lawns and landscaping, too! Home Depot carries a variety of sizes to tackle any size job. From your home to your garden gnome, clean it all with 30 Seconds Outdoor Cleaner. To treat large surface areas overtime, try 30 Seconds Spray & Walk Away. The best choice when looking to KILL Lichen, Moss, Mold and Algae, especially on those large surface areas where rinsing is a hassle. Like the name says, Simply Spray & Walk Away! Works over time with Mother Nature to erode away the dead and decaying material. Perfect on roofs, decks, sidewalks, driveways, and any hard surface where you don't need immediate results. 30 Seconds Cleaners are safe to use on all outdoor surfaces, from roofs to sidewalks and everything in between. Whether looking for an Instant Clean or a Treatment that works overtime, with 30 Seconds it's clean when YOU want it clean.
  • 30 Second Outdoor Cleaner
  • The Original and still the best Outdoor Cleaner since 1977
  • Fast acting cleaner removes stains from Algae, Mold and Mildew and wipes out Dirt & Grime instantly
  • No noisy pressure washer needed
  • Simply Spray On, and Hose Off with your garden hose
  • Safe around lawns, plants and landscaping when used as directed
  • Won't stain concrete, non-corrosive to metals when used as directed
  • 1 gallon of concentrate Cleans 200 - 600 sq. feet depending on porosity of surface
  • Use on decks, siding, patios, walks, porches, steps, lanais, pools, boats, RV's, tents, patio furniture, awnings, and more

Additional Resources

From the Manufacturer

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Product Size
2.5 GA-Gallon


Application Method
Pump Sprayer
Concentrated or Ready to Use
Kills Mildew,Non-Corrosive
Helps Remove
Pack Size
Product Form
Recommended Surfaces
Rinse required

Warranty / Certifications

Certifications and Listings
No Certifications or Listings
Manufacturer Warranty

Questions & Answers

Typical questions asked about products:

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Customer Reviews

  • 4.3
    out of 3,632 reviews
  • 77%recommend this product
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Showing 1-10 of 3,632 reviews
Surprising results
Our old sprayer broke and then we realized a spray bottle would take forever to saturate. We ended up pouring on the mixed solution, gently moved around with the broom and let it set for 30 sec to a min. Scrubbed it real good with a broom. Sprayed and saw it was lighter but not impressed but knew we also didn’t do it according to directions. Figured we’d have to try something else. A few hours later after the patio had dried we looked out and were shocked at the difference.
    • Recommended
    I have an older vinyl fence that had seen better days. I was hopeful but keeping expectations low on this product. I did not do any scrubbing just sprayed it on and let it do its magic. I now need shades to even look at the fence its so bright and white!
      • Recommended
      Amazing!!! Magic!!!
      This stuff is amazing!!! In the past, I was scrubbing our white fiber cement siding by hand and using oxygen bleach. It worked, but took hours and hours of hard labor and even with our ladder, I could only reach the bottom half of our three story home. This product is a lifesaver! My house is sparkling now and looks freshly painted! And it was so easy! This did not remove clay stains near the ground, but it does remove the mold, mildew and algae just as the product claims! Like magic!!!
        • Recommended
        I wish I would have taken pictures but trust me, my exterior window frames were dirty. common household cleaners didn't get them near as clean as this product. it is as easy as they claim, you spray it on, wait less than a minute, hose it off. My frames look as good as new! I also sprayed the painted ground where the patio trash can was and it's as clean as if there was never a trash can sitting there for years.
          • Recommended
          Don’t work
          Soaked white rocks for 3 days still have mold on them soaked fence for 30 seconds then pressure washed it did nothing
          Response from Weiman BrandsMay 11, 2022
          30 SECONDS Outdoor Cleaner is made to safely remove stains from Algae, Mold & Mildew on most outdoor surfaces. We do always recommend testing in a small, inconspicuous area first. Spray a small amount of cleaner, let sit per surface directions on the bottle, brush if needed and rinse to see results. We appreciate your business, thank you for sharing your experience with our product.
            Very Satisfied!
            I purchased this product for the first time today. I had been using a competing product but couldn't find any. While looking at the item in the store, another shopper stopped to tell me he had used the product and it worked well for him. So I decided to give it a try. I needed to clean what looks like mold and mildew on a log home made of yellow pine. I prepared the solution according to directions and sprayed it on with a garden sprayer. BAM! Years of discoloration disappeared. The "before" and "after" photos tell the tale.
              • Recommended
              For years we have looked for something to clean the...
              For years we have looked for something to clean the deck and this product delivers deep cleaning results with little effort scrubbing. The smell of the product is a little strong before you dilute it but the results are worth it.
              • Verified Purchase
              Wood fence
              Used this with a Ryobi electric sprayer on an old wooden fence. Best use for me was spray on, wait, and rinse. Pressure washer didn’t make much difference so not going to do the whole fence. Will need at least another coat to get 20 years off this fence.
                • Recommended
                Works Great
                Just spray & let it sit for a while and the mildew stains come right off without scrubbing. I used a small pressure washer to rinse and it came out great. I did my window frames, doors, siding & fence with it. Same result on every surface.
                  • Recommended
                  1 found this review helpful
                  It works as expected!
                  it's awesome! it saved me time, money and I even got to brag in front of my mother-in-law , lol buy the 2.5 refill if you are doing a whole wall, if you don't use it all this year, you may need it next year or can help a neighbor in need ;)
                    • Recommended
                    2 found this review helpful
                    Showing 1-10 of 3,632 reviews