Everbuild patio wizard super concentrate everbuild patwiz005 patio wizard is a new type of mould and algae treatment that kills and cleans all type of green growth without the need for any washing off scrubbing or pressure washing totally safe and non hazardous to children and pets once dry patio wizard is made from biodegradable ingredients and does not include any bleach or acid contents available in 50ml super concentrate dissolving sachets in single high impact clamp packs p