30 SECONDS Spray & Walk Away Mold Killer 64 oz

30 Seconds Spray & Walk Away Kills Lichen, Moss, Mold and Algae in 1 easy step. Slow release formula works over time with long lasting results. The results become visible over time. Works on many outdoor surfaces like roofs, sealed concrete, asphalt driveways, just to name a few. Perfect to use in the fall, so it can clean for you, over the winter.