Bayer Advanced 704710 2-in-1 Moss and Algae Killer Ready-To-Spray, 32-Ounce

This moss and algae killer worked incredibly well on our cedar fence. It was very easy to use, and we started seeing results much quicker than expected. It removed the buildup without damaging the wood, and our fence looks so much cleaner and refreshed now. I also appreciated how simple the application process was,no complicated steps or hassle. Overall, a highly effective product that delivers fast results and is perfect for bringing outdoor surfaces back to life.

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.

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!!

I'm not sure if it's something in the PNW but this stuff has no effect and seems useless. Did not have any effect on moss on entry sidewalk. I should add that powders and other commercial products seem ineffective as well. Feels like the entire industry might be selling useless products. Diluted bleach works, this stuff doesn't.

This was easy to set up and use, but it didn't thoroughly kill the moss on my roof. In areas with thinner moss or something that may be lichen/algae I noticed an improvement, but with moss along shingle edges it became a bit brown, but didn't kill it enough to loosen the moss, and the moss recovered. I did wet and attempt to soak all the moss, but I'd suggest trying to really, really, really, thoroughly soak any areas of thick moss with this, very well, in order to ensure it works. I was trying to kill moss on half of a 2 car garage roof, and I'd estimate one bottle for that area (I used less, which I regret). It does appear that this did no damage or staining to my roof, gutters, or lawn in the area where it came down from the gutter downspouts. So that is good.