Wet & ForgetMoss, Mold, Mildew, & Algae Stain Remover Multi-Surface Outdoor Cleaner Concentrate, Original, 128 Fluid Ounces

This stuff is awesome! Just follow the easy instructions and voila -- concrete walkways are completely clean. So much easier than using the water pressure. It does take a few days for the results to appear and you need to use caution around grass or other plants, but well worth the wait.

My Mom loves this

Easy to use, spray on and walk away

Satisfied

I have used this product on driveways, unpainted fences, rock retaining walls, concrete blocks, brick walls unpolished landcape granite stones, paved pathways and composite decks. It cleans so well, that it eliminates need to pressure wash. Concrete Driveway was almost black, before application, however, now it has a newly laid look. I have been using his product near plants (not edible) and have noticed no damage. Yes, its hard to control overspray 100% of time. I love that rain, snow, wind are also the cleaning agents and I dont need to waste any additional water in cleaning. Water is expensive. Rock retaining walls look like newly installed and just made, after using this product. I have had people think 10 year old walls were installed a month ago. I also use it on pebble bed to keep cobblestones looking clean. It works. It keeps fences clean even after 2 years of application. It doesnt seem to attract as much moss, lichen mold etc. It does give it weathered clean light grey/whitish look, which I dont mind. It does NOT give a fresh brown wood look, like if you pressure washed it.One needs to be patient after using the product. It works slowly over a year. The best time to apply it is dry fall day, so the rains can help with cleaning, not to mention winter snow. After that once a year to year and a half, maintainence is more than enough. And come spring and summer, you can enjoy the cleaner surfaces.I also used it on cedar roof. I did excellent job with it. However, the roof was old and leaked after this application, requiring me to change the roof. My theory could be a combination of any: 1) It actually started eating the moss and mold between cedar shakes, that was actually like a barrier for water somewhat. my cedar shakes had only 2 to 5 years of life left and potentially cleaning it, reduced its life 2) I walked on roof to apply the product which could have strained old shakes. - There are special shoe fasteners that I overlooked wearing. The house damage was negligible and very promptly addressed, though I wish I didnt have that extra expense. That said, I would stay out of the roof - for the rest of my life and have a professional take care of business.I almost always have extra bottles on hand. It is extremely helpful to have a battery sprayer. I used a 1 gallon manual one for years and it works just fine. Battery sprayer is way faster and probably reduces the time by three quarters.i have not tried the other product from wet and forget that connects to the hose. Many have found difficulty in the way the spray works. I dont want to try something new when this works great.Moss, slowly wears off. Lichen growing on organic surfaces is the hardest, but it loosens that up too. I noticed that the lichen dries up and does not grow even after 2 years of application. I have used this product over 10 years now and this is a cumulative review.

I rely on this product to take care of green and mold as we live in a shady area.

This product is awesome! The reasons for 3 stars is the price, the vague instructions and lack of specificity for use with the pressure washer you most likely already own and being a little vague about it getting on your lawn, flowers, shrubs and trees that surround the house. Before I go further, I will say the following statements are not meant to devalue the product. It's pretty spectacular! Moreover so people realize this before they buy it.This is concentrate. It needs to be diluted.Most of us already own a pressure washer with bottle feed attachments, rinse tips, extension pole to reach your 30' peaks and likely a foam cannon for our cars, boats, rv's or motorcycles. Formulating this for quick use in the chemical feed-tube or your foam cannon should be a given, and there really aren't directions for use with your pre-existing pressure washer.Now, while the product replaces the need for a 2500psi blast, to clean the house or ground surface, if you have heavy stains, it will leave a brown hue where the dead organic matter is left. So, you will need to either manually brush or pressure wash those areas before application.With a formula made for the bottle feed or foam cannon combined with the low pressure tip, this would replace the need to remove heavy soil, let it dry and then repeat that process with the product.That's my only real complaint. We mostly all own a pressure washer along with other basic home maintenance equipment like mowers, weed whackers and leaf blowers. Chances are, if you are buying this, you already own a pressure washer and most do not own a pressured bottle sprayer or have room for or need for a 30' ladder.What I will say is that when applied correctly, this has allowed us to skip every other wash. In the southeast we get a green film of moss on our siding and flat surfaces. Often this requires a minimum of 1 pressure wash per year and often 2.With this product, we have skipped a couple annual washes over the years. If its a normal dry spring and summer, we can almost always do this every other year.Great product, works well, great value, not very well thought out on application.