Patio Magic is a concentrated disinfectant designed for the easy treatment removal and prevention of green mould and algae on hard surfaces. It is suitable for both outdoor and indoor use and can also serve as a pre fungicidal wash. This powerful formula effectively kills green mould and algae typically within two to four days. It also helps to gently clean the treated surfaces over the following weeks and months ensuring long lasting results. This product is easy to use requiring no scrubbing. Simply mix spray and leave to dry to see visible results in two to four days. The product is liquid and comes in a blue color.