Wash Safe™ SPRAY & CLEAN Commercial-Strength Composite Deck Cleaner | Remove Black Stains | Cleans Up to 1,500 sq. ft. | Deep Set Cleaning, 1 Gal.

Just one application of the cleaner with the two to one ratio and my deck was good as new. Minimal scrubbing with a bristle broom and a rinse, done.

This product worked great, removed the black stain spots on my composite deck

This was an effective solution that did require some scrubbing but did not lift the deepest stains

I found this deck cleaner on an internet search. Wash Safe had over 100 glowing reviews. So, I called the company and spoke to them. The guy I spoke to was very helpful and said this stuff will work. I am not one of the people who used other cleaners with unhappy results. This was my first time cleaning my composite deck which suffered from what the internet defines as leoparding or in other words mold spots on the planking. The deck had one area worse than the other areas. I purchased one gallon to see if it worked as advertised. I was pleased with the results. I mixed it at a ratio of one gallon of cleaner to one gallon of water and left it soak for a couple of hours. I then power washed it. Not sure if just using a hose would work. I did notice that some spots needed the water pressure. I purchased another two gallons to finish the project including the area that had more mold than the rest of the deck. I did scrub that area with a bristle broom and after rinsing I had a bit of mold left so I dumped some of the cleaner right out of the bottle on the mold. The mold disappeared. My deck is 500 square feet. According to their website they state that one gallon will clean 250 square feet. I suspect that is an undiluted straight cleaner estimate. I mixed it at a one to one ratio as stated. Which means if my math is correct it should cover 1000 square feet. I did spray the railings around the deck and a couple of spots a bit more than the others. My guess is that I sprayed approximately 600 square feet. Not sure if I sprayed more than necessary. Seemed like the correct amount as I did it. The mold is gone. At least as gone as mold can be gone. It will probably come back. Composite decking is not free of care. It is just less care. Ok, final words. The stuff did what it said it would do in the description. If it stays mold free for a couple of months I will be happy. I do have the majority of another gallon left over and will probably clean the deck in August again just to use the stuff up and maintain what I hope is a mold free deck. If I have to pay 50 bucks a year to get rid of the mold it is worth the price. Good product so far and I am pleased. Will try to follow up in August with an update.Ok, it has been a little over three months since I battled the mold! As I suspected it is/was coming back. It is mold! It does not know the meaning of the word QUIT. Anyway, I had enough left over ( about 3 quarts ) to make about 3.5 gallons of finished product. I sprayed the deck again today. It is going to rain tomorrow so I am going to let the rain do the rinsing. I have a feeling that this will be a yearly job and is worth the expense and the work. It is better to not have mold. 5/20/2017.... An added review........I used this product to clean the white lattice under my deck. I should have taken before and after pictures. The lattice was quite moldy. Two coats of this product and some spraying with a bit of scrubbing the worst spots and it is back to a lovely white. This stuff works well.

I am afraid to use this product. It came in a cardboard box that was soaked on the bottom. When I opened it there was a plastic jug with a clear plastic bag loosely wrapped around it. The liquid cleaner wss all over my housr and hands before I read the warning that it was highly toxic to children and pets that it could cause breathing problems. I am 74 and have breathing problems have an oxygen machine for sleep zones and low oxygen levels. I don't know what yo do with this stuff. I'm afraid yo use it.

Easy to use and does a good job. Our deck is Timber tech. I did have to retreat a few spots.

I power wash my Trex decking at least twice a year. Over the 8 years of use here in Minnesota it had progressively gotten more dirty in some places. The lumber company suggested Dawn detergent and a brush - made no difference. I was curious when I discovered Wash Safe as I liked how it was described, but cautious in my expectations. To start I used a mixture of 2 parts water to 1 part solution, despite my deck being very dirty. Using my hand-pump sprayer, this 3 quarts of spray was enough to clean approximately​180 square feet of surface. It's a little tedious to apply as the spray is not very wide, but it's not at all difficult. I let it sit on the decking for 10 minutes or so and power washed it off. As you can see in the photos, the results were remarkable! I cleaned some more decking with a 3 to 1 ratio and the results were the same. You can actually watch it go to work, almost bubbling up the stains, and by the time you rinse it has already returned to its original color. From now on I'll never be without Wash Safe!

Pretty good product. I used the full gallon on a 10ft by 15ft trex deck. The black stains from the bbq are better but still clearly visible. I doubt I would buy this product ever again