How to Remove Tannin Stains from Concrete

Concrete Cleaning and Sealing, Driveway, Sidewalks, and Entryway Cleaning / By

All right, in this video I’m going to show you how to treat tree tannin stains or that stubborn algae that just won’t go away even after you’ve already pressure washed and rinse the driveway and sidewalks. What causes the dark green spots on my driveway? If you’ve still got some dark green spots or, …

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