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BioAdvanced 2-in-1 Moss and Algae Killer and Cleaner uses one formula to kill moss and algae wherever it grows. The 2-in-1 non-bleach formula kills moss, algae, lichen, mold, and mildew and will not stain or harm lawns. It works to kill within hours. The moss will quickly turn yellow, then brown and can be washed away by hand or by rain. With just one application, it protects for up to one year and can be used on lawns, patios, roofs, buildings, decks, driveways, and more. The ready-to-spray applicator is easy to use. Simply attached the product to your garden hose, turn on the water, and use your thumb to activate the sprayer. BioAdvanced 2-in-1 Moss and Algae Killer and Cleaner measures 32-ounces and treats up to 500 square feet. Active Ingredients: 22.1% fatty acid formula. EPA Registration Number: 67702-12-92564.
From the Manufacturer
One formula kills Moss and Algae wherever it grows. Treats lawns, patios PLUS roofs and buildings. With other brands you'd need two formulas to treat all areas. Kills: Moss, Algae, Lichen. Where to Use: Lawns, decks, patios, fences, mulch, driveways, gravel, roofs and buildings. When to Use: Anytime during the year. Active Ingredients: Potassium soap of fatty acids: 22.11%.
SteveM
Reviewed in the United States on March 2, 2025
I get moss growing in the spaces between my pavers or on the shady side of my palm trees and algae on my colored decorative stones. I have tried using strong vinegar and other moss killers but they never do the job. I tried Bayer Moss and Algae killer and it actually turns the moss brown in a few days and then it can be blown away or hosed off. It does not seem to affect my ornamentals or palm trees so I recommmend this for moss and algae control
Peter
Reviewed in the United States on February 13, 2025
I have used this product twice and my moss is still growing in my shady grass area. :(
A.V.
Reviewed in the United States on February 12, 2025
so far so good, this stuff worked great for less money than a name brand one cost us last year at home depot. I will buy it again for next year.
Tonya Creason
Reviewed in the United States on June 2, 2024
I used this on this tree right before I went to work. You can see the side I didn’t treat to see if I could tell a difference. It’s completely dead! I also used it on my concrete and roof. There is a shady spot on my roof that started to grow moss. I sprayed it today as well. I’m sure it worked the same on the roof. It was pretty bad in all areas. So it will take a few treatments I’m sure. I had no clue that this was a thing. I was so worried about what to do. This product was easy to use. It has a smell but it’s not supposed to smell like nothing. The sprayer could be better but did the job. If you’re like me. A homeowner but can’t afford to pay someone to help keep your house and property free of things that could cause major issues. Then this is the easy way to do it and so much cheaper! I’d definitely recommend!!
Xiaohua
Reviewed in the United States on December 4, 2024
I follow the instructions but it is not working at all. It did not kill mosses. The speed of consumption is too fast. I don’t think it covers the area it claims.
ohio123
Reviewed in the United States on June 13, 2022
I bought two bottles, one of which had leaked when I received it from Amazon. There was white goop dryed in the nozzle. I cleaned that an sprayed the roof (~240 sq ft). It did nothing. I noticed that there was pretty much still a full bottle. It looked like white goop had gotten into the hole going into the bottle. I cleaned this as best I could with tooth brush and tooth picks. Spayed the roof again. This time it used about 1/8 of the bottle. I would have expected it to be about half. After a day and a half the moss had turned a green grey (some remained green) but did not turn brown . This bottle has the slide forward to start the flow.The other bottle has a round button to start the flow. I tried that. The whole bottle of solution was used on about 150 sq ft of roof - is supposed to cover 500 sq ft. It said to wet completely so I moved back and forth, overlapping. Should have moved faster, I guess. I filled this bottle with the solution from the first bottle and did the rest of the roof. In another day it had turned brown.So it did work but the sprayer on the first bottle (with the slide) was pretty much useless and with the second bottle I used way more than I should have. There was no way of telling how much you were using.
S. Huang
Reviewed in the United States on July 14, 2021
This stuff definitely works at killing moss. Within a few days all the moss on my walkways was dead and brown. The problem is, it doesn’t go anywhere, so then you have to pick/scrape it all out. Also, the most recent bottle I received, the mixing bottle didn’t work. I had to dump it into another sprayer I have in order to use it.
James C Smith
Reviewed in the United States on September 27, 2020
This product is extremely easy to use, and highly effective. Simply hook to the end of your hose and go.I had a nasty build up of moss on my nice new roof, and after 2 or 3 days of spraying it, all the moss was turning brown. Within a week, it was dead.I'm including Before and After photos that tell the tale.(And yes, the fronts of my gutters need to be power washed! That's coming in two days from today. 👍)UPDATE: I just added the "After" photo. The moss killer did its job as advertised. The power washing then physically removed the dead moss. And I had a gutter guy add a section to connect the downspout from the 2nd story to the horizontal 1st-story gutter to help keep that area more dry.And note the fact that this product will kill moss, but does not make what remains magically disappear. You must mechanically remove the dead moss, and my power washer man made a point to tell me how firmly it clung to the shingles. This is not a ding on this product. Just a fact in dealing with moss. Even dead, its tiny roots still grab firmly to hard surfaces.Seeing this product is so easy to apply, so effective, and inexpensive, I plan to apply it every Spring and early Fall, or at least once every Summer.5 STARS
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