A patio cleaner offers the solution to accumulated dirt and stains, a problem faced by any outdoor surface. Algae, builder’s dirt, food and drink, even everyday wear and tear can leave their mark on your natural stone paving, especially where no sealant has been applied. Algae has the added hazard of making your stone slippery, especially under trees. Our stone cleaners, from market leaders Lithofin and Dry Treat, offer formulae tailored to treat a full range of staining, from green deposits caused by organic matter to algae and mortar and cement residues.