Patio Magic Patio Cleaner is a concentrated disinfectant for treating, removing and preventing green mould and algae on hard surfaces. It's easy to use: simply dilute, apply and let it dry. Suitable for both indoor and outdoor use, and as a pre-fungicidal wash. This product kills green mould and algae typically within 2-4 days, and controls moss. It's effective on areas up to 170m2, and no scrubbing or power-washing is required. Visible results can be seen in 2-4 days. The 5L size makes it a convenient option for larger areas.