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Internet # 305364046

Model # 52125A-01

Store SKU # 1003953325

Top Rated

128 oz. Premium Deck Cleaner

$10.98
  • Ready to use, no mixing
  • Great for outdoor wood decks, rails, etc
  • Best for prepping wood before sealing
  • View More Details

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Return this item within 90 days of purchase.

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Product Details

About This Product

Surface preparation is the critical first step in achieving a beautiful, long-lasting wood finish. Olympic Premium Deck Cleaner is a unique, premium quality product that penetrates deep to remove dirt and mildew stains. Restores the clean, natural look to exterior wood, concrete, composites and other surfaces.

Highlights

  • Deep cleans decks, fences and siding prior to staining
  • Removes 4X more dirt than water alone
  • Essential first step to remove stains caused by dirt, mold, mildew and algae
  • Fast action; wash off after 10-minute
  • Ready to use - no mixing
  • 1 gal. cleans up to 300 sq. ft.
  • Works with all wood types including most composites
  • Return Policy

Product Information

Internet # 305364046

Model # 52125A-01

Store SKU # 1003953325

Additional Resources

Shop All Olympic

Specifications

Container Size: 1 Gallon

Dimensions

Container Size

1 Gallon

Details

Features

No Additional Features

Materials Removed

Varnish

Number per Package

1

Paint Prep & Cleanup Product Type

Mold & Mildew Stain Remover

Product Form

Liquid

Recommended Surfaces

Deck, Wood

Returnable

90-Day

Warranty / Certifications

Manufacturer Warranty

LIMITED WARRANTY

Questions & Answers

"For proper surface preparation, surfaces to be cleaned must be thoroughly dry. However, the product can also be applied to a wet deck" AI generated answer. Dry or wet. Which is it?
ByAug 4, 2026
0 Answer | 
Answer This Question

Will it clean gray from laminated white decking
ByAug 2, 2026
0 Answer | 
Answer This Question

Can I use on composite decking as well as wood?
ByJul 20, 2026
1 Answer | 
Answer This Question

Yes, it can. To talk to a specialist, please call 1-800-441-9695.

By|Jul 27, 2026


    Can you use this clean decks that are already stained ?
    ByJul 10, 2026
    1 Answer | 
    Answer This Question

    Yes, you can but it will lighten the color. For a maintenance cleaner I would use our Flood line Pro series All Purpose Deck Wash. Product code FLD53. To talk to a specialist, please call 1-800-441-9695.

    By|Jul 27, 2026


      How do you apply?
      ByJun 20, 2026
      1 Answer | 
      Answer This Question

      Use a plastic, pump-style garden sprayer and hose.

      By|Jun 23, 2026


        How do you apply
        ByJun 17, 2026
        1 Answer | 
        Answer This Question

        Use a plastic, pump-style garden sprayer and hose.

        By|Jun 23, 2026


          How many gallons of deck cleaner do I need for a deck 24x8 with railings and stairs
          ByJun 17, 2026
          1 Answer | 
          Answer This Question

          One gallon of cleaner will clean approximately 250-300 square feet.

          By|Aug 13, 2026

            (1)

            is this plant safe
            ByJun 17, 2026
            1 Answer | 
            Answer This Question

            ~No this is a bleach based cleaner. Please call 1-800-441-9695 and a specialist can help you with ways to use it safely or use an alternative.

            By|Aug 13, 2026

              (1)

              Viewing 1-8 of 341

              Customer Reviews

              4.5 out of 5

              • 4.5 out of 1,692 reviews
              • 76% recommend this product
              Filter by:
              Showing 1-10 of 1,692 reviews
              I’m genuinely impressed with the excellent cleaning results from this product. Just one bottle was more than enough to clean my entire deck, making it a great value for the price. For the best application, I highly recommend using a pump sprayer so you can spread the solution evenly and effectively across the wood. A word of warning on safety: make sure to wear long sleeves, heavy-duty gloves, and protective safety glasses. The product is strong and it really hurts if it splashes on your skin or eyes! Personally don't like the smell at all. I applied twice on the deck. 1st time apply to the whole area. 2nd time is spot clean.
              by
              Great product, that I have been using for years. It is much better and easier to use than power washing. Just spray it on with a pump sprayer, let it sit for 15 minutes and rinse off with a garden hose. Turns pressure treated wood back to a nice blond color. Wood then accepts a nice clear wood preservative. Also uso on my ch opposite decking to clean off mildew
              by
              This review is from 320 oz. Premium Deck Cleaner
              Doesn't work for stains
              It didn't remove any stains from my composite deck stairs. It smells like bleach so I'm sure it works on mold removal, but not other stains.
              by
                Good product and way better than simple bleach wwter
                Even though this is a common, big-box store item, it works very well. I built a fencse about a year ago but did not get around to staining it. During that time it became gray and dingy-looking. Now that I am motivated to stain it I utilized this cleaning product and I was amazed at what it did to my fence. It completely restored it to like-new appearance. I did not buy enough product to treat the inside and outside faces of the fence so I mixed up a batch of bleach water at a 1 to 3 ratio to see if the home concoction would do the trick. The bleach water did make a slight improvement but nothing like the Olympic cleaner. There are reviews suggesting the Olympic cleaner is simply bleach water and that a DIY mixture would have the same result. That is not true, not even close.
                by
                  • Recommended
                  The Olympic deck cleaner worked as advertised. Followed directions on product and it not only cleaned the wood, but it took out some oil and greas stains from my grill that I was not expecting. This product has exceeded my expectations and will use in the future. Also is easy to apply and use.
                  by
                  I had to repaint my deck and used this stuff to clean the existing stained wood, which most of the stain had peeled off. I also sprayed my siding which had green mold growing on it. After several minutes, I washed it off and it removed all the crud, urine, and mold from the siding.
                  by
                  This review is from 320 oz. Premium Deck Cleaner
                  • Verified Purchase
                  Works well, but a loose cap ruined my shorts
                  Mixed feelings on this one. The cleaner itself did a solid job on my deck, I was happy with the results. But before I even got started, I picked up the bottle and found it was soaking wet. The cap was loose and leaking, and by the time I realized it, the product had already bleached a spot on my shorts. A deck cleaner with bleaching agents really needs to be reliably sealed. I never should have had to worry about that just picking up the bottle. The product works, but the packaging quality control is a real problem, and a safety hazard. Inspect the cap carefully before handling.
                  by
                  Response from Olympic TeamMay 27, 2026
                  We're sad to hear you're unhappy with our product. Our team wants to help. Please call our technical services team at 1-800-441-9695 between 8am-5pm ET. They have the knowledge and resources available to resolve the product issue. OlympicPaint
                    I cannot believe what a fantastic job Olympic Deck Cleaner did cleaning my long neglected deck. It was so easy to use. I watched the dirt and mold and mildew disappear as I was spraying it on the pressure treated wood. The only problem I had was keeping the untreated area dry while rinsing the treated area. After applying tinted waterproofing, the deck looks new!!! I wanted to attach pictures but could not find the "next page'.
                    by
                    This review is from 320 oz. Premium Deck Cleaner
                    Mediocre Deck Cleaner, Excellent at Ruining Clothes!
                    This stuff ruined a brand new $100 pair of shoes and a $60 hoodie. You might as well use Clorox. If you do use it, wear shoes and clothing you won't care about WHEN they get ruined. Only a HAZMAT suit and rubber boots will protect you. It didn't even do a great job. By the way, the shoes in the photo were solid tan.
                    by
                    Response from Olympic TeamApr 6, 2026
                    Our team wants to help. When you’re unhappy, we’re unhappy, and we’d like to talk about your issue continue the discussion with you. Please reach out to our technical services team for solutions at 1-800-441-9695 between 8am-5pm ET. They have the knowledge and resources to deal with your product issue. Sincerely, The Olympic Team OlympicPaint
                      Removes mildew and dirt without scrubbing. Very good product. Only problem is that local Home Depot doesn’t stock much, had to go to larger city to purchase my needs.
                      by
                      This review is from 320 oz. Premium Deck Cleaner
                      • Verified Purchase
                      Showing 1-10 of 1,692 reviews

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                      Product Snapshot

                      Great for homeowners looking for deep cleaning, making deck, fence, and siding prep easier.
                      Ideal for prepping surfaces for paint with its water-based formula, removing gloss, and cleaning dirt, grease, and oil.
                      Ideal for everyday cleaning of tile and natural stone, this biodegradable, no-rinse formula lifts dirt and grease without stripping wax finishes.

                      Capacity

                      128 oz.
                      1 Gal.
                      1 gallon

                      Surface Compatibility

                      Application Method

                      Odorless

                      Biodegradable