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Expert Chemical

Model # Expert Composite Deck Cleaner

Internet # 100662367

128 oz. Composite Deck Cleaner and Enhancer

This item has been discontinued.
The Home Depot no longer carries this specific product.

$18.98 /gallon




Model # Expert Composite Deck Cleaner

Internet # 100662367

The Expert Chemical 128 oz. Composite Deck Cleaner and Enhancer allows you to keep your composite deck and railings clean and fresh by removing mold and mildew. 1-gal. cleans 100 sq. ft. of decking and 20 ft. of railing with spindles. If your spindles are made of a material other than composite and you only need to clean the handrails, 1-gal. will cover 40 ft.

  • Multi-surface cleaner to be used on composite decks or railings; can also be used for concrete decking
  • Formula must be used within 30 days after receiving it for maximum chemical efficiency; after 30 days this product is not guaranteed to work 100% due to chemical break down
  • Keep the container tightly capped and stored upright in a very cool and dry place if you will not be using it right away
  • Antibacterial design helps remove mold and mildew from composite decking
  • Cleans up to 100 sq. ft. of decking or 20 ft. of railings with spindles/40 ft. of railing without spindles
  • Includes instructional application DVD
  • Due to environmental factors this product is not guaranteed to last for an entire year
  • Due to chemical break down, this product is not guaranteed to be 100% effective after 30 days

Info & Guides

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Product Size (oz.) 
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Warranty / Certifications
Manufacturer Warranty 
This product is made fresh per order, and is guaranteed to be at its maximum potency for use within 30 days as long it is stored in a cool, dry place. ** DUE TO ENVIRONMENTAL FACTORS THIS PRODUCT IS NOT GUARANTEED TO LAST FOR AN ENTIRE YEAR ** 


Rated 4.4 out of 5 by 125 reviewers.
Rated 5.0 out of 5.0 by Couldn't be happier I hadn't cleaned my composite deck in about 2 years. It was easier to use then the Corte*Clean product previously applied in the years prior. That item was increasing becoming hard to find. So, I switched to something new. I treated a small area of my deck with the chemical (just dripped out of container). Attached is a photo of it after sitting for about 10 minutes. No scrubbing was performed. All of the green mold disappeared. I have 200 sq ft deck and used 2 gallons. It barely made it on the second application. Overall results were great. I will purchase this again next year. June 9, 2015
Rated 4.0 out of 5.0 by Works very well Purchased two bottles and used a small spray pump to apply the liquid full strength. You can see from the photo that our Trex decking had both all-over mildew plus black mold spots. The mildew cleared up almost immediately, but I wasn't sure that it was working on the black mold as well, so I used a hard nylon bristle brush to scrub areas that were very bad. I recommend NOT doing this. After the product dried, the areas I had scrubbed look lighter, more worn than the deck areas that I had not scrubbed. Plus, the black mold spots had disappeared even from the areas that I had not scrubbed. It does appear that it has slightly lightened/bleached the color throughout the whole deck, but we don't really mind it. It has been a month since we've used the product and the deck still looks great. It says to be careful around plants and grass. I went back and sprayed water on the grass that was adjacent to some of the deck area and we saw no damage to the grass. I've given it 4 instead of 5 stars because of the color bleaching element and its cost. August 4, 2015
Rated 5.0 out of 5.0 by Works great! This product worked great on my trex deck! If I would hve ordered extra, it would have finished off some remaining darker areas. But it's expensive @ almost $19/gallon which covers 100 sq. feet and my deck is 800 sq feet-ouch! :(, so I tried to be conservative but still used 7 gallon which computed out to $133 just to clean the deck. I didn't have enough to give it a second coat as it says, but will definitely use it again. Our deck is very shaded with trees and is on the north side of the house which contributes to mold, and stains from multiple leaves in the fall. The actual color of the trex is saddle, but it looked more like walnut before applying the deck cleaner as you can see in the photo. June 8, 2015
Rated 5.0 out of 5.0 by Wow my Deck looks brand new I read reviews all over the internet trying to find a good product to restore my composite deck from the stains and dirt. I purchased the deck cleaner and enhancer through Home Depot. I started with a small section of the deck. The minute I applied this product it started to work and with in 30 minutes that section looked brand new. I have since order more product to finish the remainder of the deck. It really did work for me. September 10, 2013
Rated 5.0 out of 5.0 by product works on Trex decking. I followed the directions pretty close and the first application took all the mold off. I continued as directed. It did seem to fade the color a bit, or some of the cleaner residue is still present. There is no trace of the mold and when the deck is wet all the color is restored. So next step per Trex website is to buy a restoration color product. Step after that is to never buy Trex again. Low maintenance, yeah right. October 6, 2011
Rated 5.0 out of 5.0 by Works like magic!!! I did some research and this product was rated very well so I decided to give it a try. It was worth every penny!! This product works much better than any other deck cleaner I've used in the past. I highly recommend it!!! August 4, 2015
Rated 5.0 out of 5.0 by Really did the Trick - Great Product The product had to be ordered online. It arrived at my house within 4 days of ordering. The directions stated it had to be used within 30 days of delivery to ensure the chemicals in the product did what they were supposed to do. After reading the directions, I emptied the product into a sprayer and sprayed my deck. It immediately began breaking up the mold spots. This product was outstanding...It did the trick as far as cleaning my composite deck which now looks brand new. I would purchase this product again and would recommend it to anyone with a compositie deck. May 5, 2015
Rated 5.0 out of 5.0 by It works great! I was skeptical at first because I had tried several other products. So I ordered a single gallon to test a spot on my deck. After my test, I ordered 5 more gallons to do the rest. Follow the directions, and use it when you get it ( very short shelf life ). It worked great on the composite deck material that I purchased from Home Depot 4 years ago. September 20, 2015
  • 2015-11-29 T09:57:27.472-06:00
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