Nano Photocoat is great for all environment. If anyone is looking for ways to extend the life of paint on exterior buildings, we can do it and to make your paint to look like new, no more mold, algae or moss growing on buildings. No more stains from deterioration of caulking, nails, etc.... They will be gone forever. If you would want to eliminating maintenance cost and hassle, you really want to have Potocoat install to your exterior walls and windows. Yes, windows too! The coating is transparent; does not alter and change the look on windows. The best part is, the coating keeps windows free of streaks and stains.