Resolva Xtra Clean removes green mould & algae from patios, fencing, decking and many more surfaces. Our formulation is effective and requires no scrubbing or pressure washing, so its hassle free.  Resolva Xtra Clean works without the need for acids or bleach which can damage some surfaces. Benefits: Easy to use, no scrubbing required Kills green mould, red & grey algae Results within 1 week Long lasting protection Kills lichen & bacteria Biodegradable Can be used in path, patios, driveways, fences, walls, pots, glass, bricks, etc. Contains Dimethylbenzyl Ammonium Chloride