30 Seconds Outdoor Cleaner | Cleans Moss & Algae Stains from House, Vinyl Siding, Deck, Patio, Fence - 3 Capped Bottles, 1 Hose End Spray Attachment (64 Fl Oz (Pack of 3)

Good stuff! Cleaned my sidings and it was a breeze. Easy to use and works fast. My sidings look bright and white. It does have a strong smell esp if you're working in a closed space (I cleaned my car port) so be careful. Wear protective glasses and gloves and be aware of stain on clothing as other users stated altho I didn't get any. But super effective. Use properly. I forgot to take before photos but you can see how bright my sidings are. Super happy with this.

This products works great on outdoor decks and deck furniture. Hook the hose, spray and wait about a minute and rinse. It removes dirt, mildew and mold without any scrubbing. I use it every year on my deck and deck furniture and siding.

Easy to use. Product works exactly as advertised - spray on, let sit on surface, rinse. Cleared my north-facing siding all the way up to second story without need for ladder. Just my hose and the cleaning solution with included dispenser adapter. If you apply and scrub, your surface will be like new. I chose just to apply and rinse. Siding still looks fresh and clean, though if you walk right up to it, you can see some minimal, faint residue in some areas. For sake of convenience and time, apply and rinse works great. Only reason it's not 5 stars is that there was some minimal leakage during shipping due to the caps of each of the bottles allowing small amounts of solution out - likely due to the boxes being stored incorrectly in inventory and/or during shipping.

It works great, as promised. A North wall of our "barndoninium" had a fair amount of algae growth and some mildew (about 800 sf). I followed the directions and worked in sections of the 20' high walls. Although I question the coverage area claimed per bottle, the two bottle package cleaned our painted metal panel walls perfectly. The rinse setting was also effective.Time will tell how well the alagae and mildew were killed, but I recommend this product. Buy more than you think you need. Also, I did not experience any of the packaging issues some reviewers had.

I bought two bottles of this along with the hose adapter. My goal was to try to get rid of algae and mildew at our creek front cabin. It’s constantly humid and when it rains, the painted deck surface gets a bit slippery. We have a similar problem at our home with flagstones on our patio, even though it’s not on a creek.I let the product sit on the deck for the recommended five minutes, then scrubbed it a bit with a stiff brush. It was warm, but not hot, and it was barely wet when I got back to the first part I had treated. The algae is definitely reduced, but not gone. I applied what was left in the first bottle on the flagstones at home, and let it sit for the full 15 minutes, then scrubbed and rinsed. I can’t see much improvement on the flagstones, but then that’s one of the problems I have with the delivery system.When you screw the hose adapter onto the bottle, it ratchets in place. If you tip the bottle, it does leak as others have pointed out. There also does not seem to be a way to remove the adapter from the bottle without resorting to destructive methods. That’s a real problem for transporting a partial bottle, but also because there is a second bottle and only one adapter. The other problem I have is that the bottle is opaque and there’s no way to know when it is empty. In fairness, the reason that it did not work on my flagstones may be that there was no easy way to know if when the product ran out. For all I know, I may have just been rinsing some of the flagstones with nearly pure water. I’m going to try undiluted product from the second bottle on one of the flagstones that didn’t respond well.All that being said, for reasons I can’t fully define, this underperformed in my opinion. If you decide to get it, I would not recommend getting the package that includes the hose adapter. A garden pump sprayer might be a better choice in that you know when the product and water you mixed in runs out. As for the product itself, this does not appear to be any different from the many deck washes that are out there. It’s mostly chlorine and soap, which you could mix up yourself (2 gallons warm water, 2 cups of 5-6% bleach, 1/4 cup dish soap). Whether you use commercially available or make your own, don’t leave it on wood surfaces too long, or you will degrade the surface and end up with wood that looks “hairy.“

This product really does work. I typically use it once a year (sometimes every other year) to remove algae off vinyl siding on the shaded side of my house. Easy to apply with a hose. Spray actually does reach 2 stories. Literally only takes 30 seconds to work. Then rinse. Does what it says and I’m always happy with the results. Also use it on my deck. The only thing to note is you can go thru the product pretty quickly so get the product on as quickly as you can.

Like other people, my home decided to grow some green stuff (mold). I did a lot of looking into this, needed something to clean the mold but not hurt my shrubs. Finally decided to give this stuff a go, and worry about shrubs later. It worked killing the mold, it took about 10 minutes to kill the green and hosed off nicely, I also hosed off my shrubs within that same time frame. So far the green is gone and the shrubs are not showing any affect from the solution used

This product works well if the instructions to apply to a dry surface are followed. It was unnerving though to put it on, let it sit for a while, then rinse only to find that the stains weren't removed. However, after the surface dried, the stains were all gone. It just requires patience.