Wet and Forget is the easy, one step solution to removing outdoor moss, mold, mildew, and algae. EPA (Environmental Protection Agency) registered. Non-caustic, non-acidic, and contains no bleach. No scrubbing, rinsing, or power washing required. Safe for all outdoor surfaces. Ideal for cleaning vinyl siding, decks (wood and composite), and roofs. Dilute and apply with a pump up garden sprayer. Mix Ratio: 1 part Wet & Forget to 5 parts water. Product works gently over time. Safe around plants and landscaping when used as directed.