Ratings may include incentivized customer reviews.
What Customers Are Saying
The product effectively removes mold, mildew, and dirt from decks, often restoring them to a like-new appearance with minimal scrubbing. However, some users have experienced issues such as wood discoloration, residue, or damage to composite decking. It's important to follow instructions carefully, including letting the cleaner sit for the recommended time before rinsing and potentially using a brush for stubborn spots. While generally effective, a small percentage of users have had disappointing or damaging experiences, so testing the product on an inconspicuous area is advisable.
Customer review summary generated by AI, including incentivized reviews.works well
Would RecommendEasy to use with a pump sprayer. I scrubbed with a deck brush since my deck hadn't been cleaned in a while. I have a lot of nooks and crannies on the 3 layer deck with railings so I needed more than I thought I would.
Verified Purchaser
Excellent result
Would RecommendI used this as per instructions and it worked as advertised. I'm very pleased with this product and would highly recommend it
From olympicstains.com
Excellent cleaner
Would RecommendI bought this to clean our porch that is about 28 years old. The porch had not been cleaned in years and is in a shaded area(lots of green stuff growing on it). I applied with a sprayer and saw grime coming off instantly. Once I rinsed the cleaner off, it was like a new porch. I am just going to seal it now instead of painting or staining it. I highly recommend this for wood. Be careful, though, as the cleaner gets very slick and I did fall when I walked over it. Another warning- wear old clothe...
Verified Purchaser
Olympic cleaner worked wonders
Would RecommendThis product worked great. Our treated wood deck is three years old and I thought I would have too pressure wash my deck. To my surprise it worked great. Really!! I won't pressure wash again. Wood looks like new.
Verified Purchaser
Cleaner
WARNING!! I just purchased 4 jugs (2.5 gal) of this to finish cleaning my fence. However one of the containers appeared to have a defective cap because it leaked onto me as I was carrying it from the cart to my truck ruining a new pair of shorts. The product does a fantastic job and I will continue to use it but it the future will always check the cap before selecting the jugs in the store. Before you buy this product check to se that the caps are screwed on tightly because one on the ones I...
From olympicstains.com
Boom...no more yuck.
Would RecommendUsed this on our deck after gypsy caterpillar season. Wash works great, but i still had to scrub. Bleached out all the disgusting material left by those nasty bugs. One issue is watch for spray back. I got it on my shorts. They are now speckled from the bleach. Oh well. The deck looks great. Not sure how this could be biodegradable though. Kept my animals away.
Deck cleaner
Would RecommendWorks well with out being super harsh . Definitely follow the instructions about sensitive plants and bushes.
From olympicstains.com
Great Product still needs scrubbing
Would RecommendWe used this on our deck which was in pretty rough shape. It looked amazing but it still ended up needing to be scrubbed. It didnt clean off all the algea but It made easy work of scrubbing afterwards. I definitely recommend this but keep in mind scrubbing will make it look even better afterwards.
Light Grey
Would Not RecommendThis product is totally useless - put it on as directed, waited as directed and rinsed as directed and nothing happened. Had to power wash deck afterwards and then sand it to get all the dirt off. It is not as caustic as implied because it never hurt any plants. Did not even lift slight aging from planks that were not exposed directly to the weather. I have a much larger deck to do and I am not sure what I will use but it won't be this product. I can not say enough bad about it.
From olympicstains.com
Hi there, We are sorry to hear that you are not satisfied with our deck cleaner and we want to make this right for you. Please call us at 1-800-426-63... Read More
WOW!!!
Would RecommendHaven't cleaned our composite deck in years and tried other leave on products with disappointment... This worked immediately and my ivory rails weren't charcoal color anymore! Wow wow wow brand new look again! Thanks to the Lowes guy in the paint Dept!
did not use paint
Would Not RecommendI bought this product to clean the deck around a pool. I applied according to the directions. Sprayed on a dry deck then hosed it off. It did not remove very much of the dirt and left the deck very slippery. I had to power wash the deck to get the deck walk able.
From olympicstains.com
Hi there, Sorry about this. Please give us a call at 1-800-426-6306 so we can help you out.
Works good but lesser coverage
Would RecommendAlthough it didn't cover as much area as listed, I left it of extra long. The extra time was recommended by a previous reviewer, and really made a difference! With a bit of scrubbing, it left a nice final result!
Verified PurchaserVerified Pro
WASTE OF TIME!
Would Not RecommendIT WILL CLEAN YOUR DECK BUT BE READY TO SAND IT AFTERWORDS......USE SOME SOAP AND BLEACH WITH A BRUSH.....WILL WORK BETTER AND KEEP YOU FROM SANDING......COMPLETE JOKE
From olympicstains.com
Hi there, Sorry that you are unhappy with our deck cleaner and we want to make this better for you. Please call our technical experts at 1-800-426-630... Read More
Not strong enough
Would Not RecommendI tried using this cleaner and unless you are using a pressure washer, you're not going to get it clean with the product alone. I'd bet just the pressure washer would suffice.
Verified Purchaser
Hello, Thank you for your feedback. We are sorry that you did not have a good experience with our deck cleaner and we want to help. Please call us at... Read More
realy works
Would RecommendTo work right you will need a scrub brush with a long handle, and get ready to scrub. Looks good and you can see the crud rinse away,
Olympic elite natural
Would RecommendThis is the only deck cleaner that I have used that actually works. I also used it on my concrete driveway and it now looks new. Do not know what caused some people problems, probably did not read directions.
From olympicstains.com
Deck Cleaner
This works awesome. Due to a problem with my pressure washer, I didn't even get to use it along with the cleaner, but I have a clean deck. I used it on my composite textured decking as well as removing the murky layer from my stained wood railing to give it a fresh coat of stain. Some tips: - Due to a breeze, I ended up applying with a paint roller on an extension pole, putting the product in a roller pan. Worked great with no over spray waste. Use a fluffy roller. - It WILL bleach any clo...
From olympicstains.com
Premium Deck Cleaner
Would Not RecommendWhat an awful outcome. We bought this to clean our six month old deck prior to applying sealer/stain. Now, we have about 275 sq feet of white furry wood. We put far too much sweat and money into building this deck to have it look so awful. The bottle specifically says "no scrubbing necessary" but we even tried that in order to get the fuzz off. VERY DISAPPOINTED! Who is going to pay to fix this mess?
From olympicstains.com

Hi there, Sorry to hear the cap came off- that shouldn't have happened. Please call our customer care team at 1-800-426-6306 between 8am-5pm EST.