Power Blaster Algae & Fungi Cleaner is designed to remove Algae, Fungi, Lichen, Red Discolouration and Slimes from Astro-Turf, Concrete Kerbs, Decking, Fibreglass Boats, Footpaths, Greenhouses, Headstone, Pottery, PVC, Slate Roofs, Tile Roofs, Tarmacadam, Timber and Walls.