Rated 3.8 out of 5 by 26
Rated 1.0 out of 5.0 by gmanatl Actually, it's just deck SOAP
When a product says Deck CLEANER - that's what you expect. For example, Olympia deck cleaner strips off all the dirt , mold and algae by itself, it's a true spray and rinse.
This M-1 junk is basically a SOAP. After reading the fine print, you HAVE to use a pressure washer ! If I was going to use a pressure washer I wouldn't need this, or anything else!
First I tried it diluted like they said. Nothing. Then full strength. Nothing. It wouldn't even dissolve the dirt on my lawn furniture.
I might as well sell a bar of Ivory soap as deck cleaner. "Just dissolve it in a gallon of water and spray on deck. And for REAL results, make sure you use a pressure washer"
See the attached picture, gee, guess which part of the deck was cleaned by Olympia, and which my M-1.
April 18, 2016
Rated 3.0 out of 5.0 by Roger Good cleaner for tough stains
We used the Deck and Roof Cleaner for cleaning out garage in our new house. A corner of the garage had some tough stains on it due to oil based chemicals storage by the previous owner. i sprayed the area with the cleaner and left it for some time, scrubbed the area with a hard brush and rinsed it off. I would say 70% of the stains were gone with the first try and a second clean out got rid of the rest.
May 1, 2016
Rated 3.0 out of 5.0 by JoeD Hard work needed
Label says no scrubbing. Not true. Even using it undiluted it did nothing. Had to scrub pretty hard to get rid of years of weathering. Still had to go over some spots again. It does work, but not without a lot of elbow grease.
June 25, 2016
Rated 5.0 out of 5.0 by Debbie2002 Ready for Staining Without Much Effort
Easy and effective without much effort. Spray on, brush in, and power wash with a Home Depot power wash and your deck is ready for staining. This product took off over 10 years of dirt and grime. Wear protection as the chemicals are strong and irritating on the respiratory system.
June 10, 2015
Rated 5.0 out of 5.0 by Shopshark This works well but requires some effort
Friends, I'm sharing my test results of different roof-stain removal efforts and products, including this one, which I now recommend because it works and is worth ten bucks.
Some Background: I have a 12-year old, grey colored, GAF 30-year asphalt roof that I let go too long re: black mold, blended with copper-colored and green-algae stains. Some areas have all three, others just black mold, or that strange copper tone that weirdly glistens in direct sun.
I first tried a pool-shock based, DIY mixture. I mixed a cup of powdered pool shock with 1-gal of water and spayed it on my roof. I waited 10 minutes and then re-sprayed that same area with this stuff:
20 minutes later, I garden-hose-sprayed the treated area off. Some green and black mold was removed, but plenty of staining remained. A repeat treatment did little better. I lost patience.
So I went back to Home Depot to try "M-1 Roof and Deck Cleaner":
It said mix 13 oz in a gallon of water and spray it on. I probably used 20 oz. because, well hey, my stains were really dark. I sprayed the mixture using a $16 hand-pump sprayer, something like this:
I came back in about 15-20 minutes and still there was no change -- UNTIL I sprayed, close-up (4” away) each shingle with my garden hose (narrowly focused spray using a standard nozzle). I didn’t want to use my pressure washer, it was too much of a hassle to get it out of the garage.
It worked! All the dark mold and gunk was stripped out of each shingle.
Mind you, I had to work some. I had to methodically spray each shingle up close, so that’s a lot of back-and-forth, tiring my arm.
To be clear: You must stand over a patch of roof and bend over and direct-spray each shingle, from about 3-4" away, at full blast (guessing my hose was outputting at 200-300 psi or so).
Yes, you’ll get wet.
But all the gunk came out of each shingle, and it was satisfying to see my roof shingles restored to what they once were. And honestly, the mold I had looked like it would never come out. So, I was impressed by M-1, and pleased at the price ($10 bucks a gallon).
Bottom line: From spray on to spray-off, it takes about a half hour for each 60 square feet of affected roof. I had about 180 square feet of afflicted roof area.
Of course, you need to do this when the sun is brightly shining on your roof so you can see the dark mold shingles from the wet ones.
I suppose the job would go faster with a pressure washer and wide enough spray head. But I was worried I'd use too much pressure and prematurely wear out my shingles. A garden hose, with standard output, will do the trick. It just takes longer.
I also invested in a (more expensive) "Spray & Forget" solution:
That product is designed for the lazy. You spray, then walk away. No immediate results, though. It says it takes weeks if not months to work (relies on rainfall).
I don’t know if that’s true (just tried it today), but after I finished my “M-1” job, I sprayed the just-cleaned area with it. I figure it's a good way to prevent recurrence of the mold and algae that constantly afflicts my Savannah, GA roof (Savannah is a high-humidity environment and thus one is constantly battling mold and other forms of "ick" on one's home).
January 24, 2016
Rated 3.0 out of 5.0 by Gallus No bleach or acids -- but it does have lye!
This particular solution remains mostly unused, thanks to the chemistry that I discovered after reading the MSDS. I was planning to use it on my roof to remove the staining, but I decided against it. A test spot showed that it indeed removed the staining, but I decided not to go much further, and used a solution of bleach and Jo-max instead. Many deck cleaners have oxalic acid (a weak acid), and many mildew removers require the use of bleach. I find it funny that this material boasts of not containing acid or bleach, when it does contain a 14% concentration of NaOH, sodium hydroxide (lye, drain cleaner.) NaOH is a strong base, so this is correct that there is no acid or bleach, but NaOH is, in my mind, more dangerous than oxalic acid or bleach. Aluminum and NaOH are a famously bad combination. Now, if your aluminum capping is painted, and you rinse this solution quickly, there will be no problem. But I didn't want to risk it around the gutters, capping, and other aluminum siding on the house. So for decks, I can't see any harm, but for roofs, I do wonder about the wisdom of washing aluminum trim with this solution. If nothing else, the chemistry should be advertised/warned about more prominently.
October 12, 2015
Rated 2.0 out of 5.0 by Bosnm8 Ok, but need more than garden hose pressure to work properly...
Bought this product to clean black streaks off my roof. At first glance did ok job to brighten lighter stains, but as for the darker stains it turned into a gummy mess that took a very long time to get off with a garden hose. Switched to 50: 50 mix of bleach and water - worked like a charm!
August 27, 2015
Rated 5.0 out of 5.0 by Andrew No complaints
I've used this on my deck once so far and I couldn't be more pleased with this product! Any stains that were on my deck are now gone. I echo what another reviewer said in that it's best to do this on a rainy day. I'd recommend this to anyone with a deck that's in need of a bath!
July 7, 2015