30 SECONDS Outdoor Mold & Mildew Stain Remover Spray, 32 oz 2 Pack

Between my sprinkler system and myself watering my plants, my patio was turning green from the algae. As soon as you spray this you actually see the green disappear. After five minutes, you just rinse it off with the hose no scrubbing at all. Excellent product!!!

Worked well on vinyl fence. We sprayed it on and waited for a minute. Used a high power nozzle on hose and it came off without scrubbing. Had to go over it a couple times in areas but definitely worth the money.

Worked pretty good with a metal scrub broom on my bricks!!

This stuff works beautifully. Moss on my roof is now dead. Sides of my house no longer have the green stains. Highly recommend.

This is easy to use and does very well. I just didn’t realize that you have to rinse it off.

So I had power washed my shady, Northern exposure front entrance that consists of a concrete and brick porch and steps, bluestone stair treads, concrete walkway, and paver retaining wall. I had normally faithfully done this every spring and it looked great. However, for the last 4 years, I had skipped this chore and it looked bad. This year, I got out my power washer and things cleaned up beautifully as usual. I had removed all the thick moss and algae, but I still had some green and black spotting that remained. I decided to buy this to treat everything I had just power washed in order to get rid of the remaining stains and hopefully slow down any regrowth. I applied this as instructed. The sprayer is pretty precise with no overspray so it wasn't messy or worrisome. Getting it on my clothes, skin, or shoes was not an issue, and wearing gloves was not necessary. While the sprayer worked well, the wand is way too short. Because of this, you have to work completely hunched over, and I'm a short 5"2". The wand should have more foldable sections, like the wand that comes on RoundUp Weed Killer, so you can stand upright while spraying. Also, because you have to squeeze the trigger the whole time, the application process gets tiresome. My porch floor only measures 6' x 8' but doing a whole large patio or driveway with this applicator would be hugely challenging. As for the 30 second claim, don't waste your time or money. I left it on for 15 to 40 minutes depending on the area. The 40 minute area of my porch floor looked mildly improved. Any shorter duration was completely ineffective. The stairs which were left for 20 minutes and retaining wall left for 15 minutes, showed no improvement. Because it was getting dark out, I couldn't let those areas sit any longer before rinsing them. Given the non-results and the tiresome application process of working hunched over with the too short wand, I would never recommend this for use on any large areas. At over $30.00 a bottle, and no dramatic results, I wouldn't buy this again. At least not for this purpose. The results were very disappointing. It did nothing that my power washer didn't do, and the power washer was much easier to use.

You really need a hose. It works okay to remove mildew but it takes at least 3-5 per application minutes to do so. Likewise, one of the bottle's sprayer nozzle did not work. I have a hand sprayer, so I used that instead. You also need a strong water spray to make it work well, not a hand sprayer. All in all, I wouldn't recommend this again for the price.

I had a porch that was growing some mildew. This got it off very easy. I did have to wash it down with water after. But it required very little scrubbing.

A severe windstorm last year caused the siding on the house to be imbedded with dirt and grime that we were unable to remove. We heard about 30 seconds outdoor cleaner and decided to give it a try. After spraying down the siding, and waiting a few minutes before rinsing it off about 90% of the dirt and grime was gone. A but of light scrubbing removed the rest of the dirt and it now looks like new. Great product!!! Next time for a bigger job I will get the large size with the attachable hose.

Works great on my concrete pavers

I've been using this product for years. It works as advertised.

It was difficult to choose whether to purchase the trigger spray, pre-diluted, ready-to-use version, or the larger bottle which needed to be diluted before using. I had been advised to use this cleaner to remove soot and residue from my soffit and exterior wall, after using my natural gas fireplace all winter. After two separate tries made by a professional cleaning person, 30 Seconds Outdoor Cleaner did not erase or dissolve the soot and marks completely from my wood siding, or the metal soffit and gutter above. There is some improvement, but not the complete cleanup I was expecting to get from the effort put into the job, or the extensive list of surfaces for which it was suggested. On top of my disappointment with the result, there was the expense of purchasing the product; consequently, I cannot recommend this cleaner with any degree of certainty of its success, or value for money spent.