Granite GoldOutdoor Stone Cleaner - Deep Cleans Stone And Concrete Patios, Decks, Driveways - 64 Ounces, Model:GG0041

Works well

It has some effect, but it is not excellent for removing fungus/mold from stone.

Had no effect on my concrete patio or garage or driveway

Did not clean iron or mildew stains on bluestone fyi....Iron Out is better alternative

I have a granite/brick fence with stainless steel gates and marble pillars. This product does a great job cleaning them. All you have to do is connect one end of the water hose to the cleaner. There is a knob on the front of the cleaner that when you turn to the middle you get the cleaner mixed with water and if you turn all of the way to the right side you get just regular water.

I rent a condo where the HOA has not been very diligent in keeping the grounds neat and clean. The stairs leading up to my front door (which are rarely used due to the building layout) looked like they hadn't been cleaned in a year, maybe more. There was caked on dirt, dead flowers and other assorted accumulated stuff. Following the instructions, I first washed down the tiles with water. I then turned the nozzle to clean. I did a little bit of mild scrubbing on some particularly heavy stains, using a brush made for that purpose. But, I didn't put a lot of effort into it. I let the cleaner sit for about 10 minutes, then washed it off. The dirt and debris was rolling away. It took quite a bit of rinsing to get all the dirt to flow away. It was a humid day, so it took a few hours for the stairs to dry. But, when they were dry, they looked surprisingly good. Some of the more difficult unknown substances did not completely vanish. But, as I said, I didn't put a lot of effort into the scrubbing. Overall, the stairs look pretty clean and the product was easy to use. The water/cleaner drained into an area where there are a number of tropical plants. They were totally unaffected. I didn't notice any strong odor while using the cleaner. My only complaint is that turning the collar from off to rinse to clean and back was somewhat difficult with wet hands.

I really wasn't happy with this because it didn't really clean up my geanite very well. No shine.

I was skeptical at first as I’ve tried numerous cleaners on my patio. It’s a poured red brick pattern with concrete colored grout. It sits under a deck so lots of yucky things seem to attach to the brick. And I could never get the grout clean. This product is amazing. I had to scrub with a scrubbing broom and treat one particular place twice, but am so excited to have clean grout again. This is the best product I have ever used.