Patio Magic Patio Cleaner & Moss Killer is a concentrated disinfectant for easy treatment, removal and prevention of green mould and algae on hard surfaces. It is really easy to use, just dilute, apply and leave to dry. Suitable for both indoor and outdoor use, and as a pre-fungicidal wash. Kills green mould and algae typically within 2-4 days. It also controls moss, and can treat up to 170m2 of area. No scrubbing or power-washing is required. Visible results can be seen in 2-4 days. The product comes in a 5L size.