Citra-Shield Outdoor Cleaner (Concrete Cleaner, Roof Cleaner, Walls Cleaner, Headstone Cleaner, Deck and Vinyl Siding Cleaner) - RTU Outdoor Cleaner Pack of 1

I bought this a few years ago and my sprayed the brick on the outside our house that had green mildew on it. We live in a hot and humid state. We have not had to reapply it as of today still. There is none growing back either. Worked great for me!

Before and after. Even though the picture is taken at night, you can see a significant difference in the cleanliness of the stone. Love it. Started brightening up my friends families stones too! Takes about 3 months to see the full difference but when we used a scrub brush lightly on another stone for the initial spray, we saw results a little faster.

I used this on my 60 year old concrete walkway and part of my concrete driveway. I bought one gallon to see what it would do. I used my garden sprayer to apply enough to wet it down, very easy and no bad smells. Did not go real far but did the walk and about 1/4 of the driveway. Took about 3 weeks to see noticeable results and has slowly gotten better after 6 weeks. I am pleased with the results so far and plan on getting a couple gallons to finish to driveway and another light spray on the walkway. It would be nice if this were a concentrate or a better price for the ready to use gallon. It could not be easier; spray it and forget it then wait for the results. If you need instant results this may not be for you. So; it works well albeit slowly.

Bought a gallon trusting that it worked.....WASTE OF MONEY,Do not buy this colored water because it certainly DOES NOT WORK,nothing but a gimmick

Excellent