Rated 4.0 out of 5 by 22
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 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 4.0 out of 5.0 by Greeneyety Worked as advertised
Applied it on my deck through my power washer on low spray level. Used a stiff brush with light pressure to work it in a little better. Let sit for about 10-15 minutes, making sure it didn't dry by lightly spraying every 5 minutes, and power washed it off at medium to high pressure. Deck wood looks almost new. Removed all the mildew, dirt, and grease spillage from my BBQ grill. Deck is about 15 yrs. old and hadn't been cleaned in 3-4 years. Even loosened up the old peeling stain to help removal with power washer. Good product...worked as advertised.
June 26, 2014
Rated 5.0 out of 5.0 by kevin works great
i have been using this product for more than ten years now.i found that if you are cleaning your deck its best to do it on a rainy day,because the deck needs to stay wet the whole time. mix it 9 to 1,and spray it several times and just keep it soaked with the cleaner and a wet surface for an houre and rinse ,when the sun dries it out it will be cleaner,clean enough to stain.never p.w. a deck it will ruin the wood.
March 16, 2013
Rated 5.0 out of 5.0 by Topgun59 Exceeded my expectations
I replaced my roof shingles 5 years ago with a light tan color and oak trees hanging over the house had resulted in "tree scum". I was hesitant about harming the new shingles but used M-1 as directed and rather than using a pressure washer, I used a high pressure nozzle on a water hose to rinse. The result is that the affected shingles now look new like the rest of the roof. Azaleas planted directly in the roof drip line were not harmed in the process and I did not cover them. I highly recommend this product.
May 9, 2013
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
Rated 5.0 out of 5.0 by MamaLou Great Stuff!
Don't waste your money on anything else! I used in on a deck and roof shingles and the dirt and crud came right off. Anything else I've tried didn't work as well as this stuff.
It doesn't have a bad smell at all, and it needs only 10 minutes to work. My deck is small, so I have probably enough left to last me for 10 yrs.
June 11, 2012