30 SECONDS Spray & Walk Away now available in a fast, Ready-To-Use Hose End Sprayer attachment. KILLS Lichen, Moss, Mold and Algae in one easy step. Simply Spray & Walk Away. 30 SECONDS Spray & Walk Away is a slow release formula that works over time. Mother Nature does the work for you, eroding the treated matter, while it decays over several weeks. Perfect for those LARGE surface areas that you can Spray & Walk Away, such as roofs, walkways and walls. And best of all, it saves water, time and money, not having to pressure wash or rinse off. Popular with contractors that are looking to clean large areas such as roofs, subdivision walls, hotel balconies, golf course paths, and so much more. Now with the Hose End Attachment, Spray & Walk Away is now easier for home owners to treat roofs, siding, walks, lanais, pool cages, brick, stone, fences, and other hard surfaces around the home. 30 SECONDS Spray & Walk Away is easy to use, applies in minutes, works for months.