KleanALGAE BLMO5 Black Mould & Algae Moss Remover 5L A heavy duty mould inhibitor. Clean and remove algae, black mould moss mildew and green slime from stamped concrete, stencil concrete, tennis courts, clay courts, synthetic grass driveways, tiles, pavers, bricks, concrete roof tiles, terracotta roof tiles, colourbond roofs, sandstone walls and granosite. Reacts and removes the mould and grime from the affected area without scrubbing or rubbing. Heavy mould may require further reapplication and a rub with a scourer or a brush. Use Neat – Do not dilute with water.