GardenersDream Patio Cleaner 5L - Concentrated Outdoor Algae & Mould Remover GD_CHEM_PFC_CON_5L GardenersDream Patio Fresh Cleaner 'Concentrated' is a powerful algae & mould remover designed not only for patios, but decking, driveways and other outdoor hard surfaces. It creates a clean and safer space by removing all unsightly green mould and algae. This solution helps protect your surfaces by preventing regrowth for up to 6 months. Avoid applying solution when rain is forecast. Ideally use late evening when the light is less intense. Simply mix the liquid solution with water either in a watering can or pump spray. Keep pets and children away from the applied area until dried out. Full Instructions are displayed throughout the labelling on the bottle.