Roof Clean Xtreme is a professional grade cleaning product, that transforms the look of any old & tired looking surface. Roof Clean Xtreme offers the simplest & most effective method of keeping your surface completely clean without the need for any intense pressure washing. Roof Clean Xtreme has a combination of 4 powerful, fully active ingredients that allows you to easily remove Black & White Spot, Algae & Lichens, Moss & Surface Grime from any tiled roof. Instructions for Use - Application Guide; 1. Remove any loose debris or heavy build up off moss. 2. Wet the surface with water. 3. Dilute product at a ratio of 1:1. 4. Apply generously to Roof using a wayer can or pump sprayer. 5. Leave on the surface for approx 60 minutes. 6. Keep surface damp during 60 minutes. 7. Rinse off with water.