Air-Proof Concrete P is a photocatalytic product with a reinforced action towards air purification and with self-cleaning effects. The product significantly reduces all sorts of pollutants - in the presence of visible light and/or UV-light. The product is applied onto existing stones, concrete pavers and other stone applications. Air-Proof Concrete P has excellent penetrating properties. This way the product penetrates deep into the surface, 1 to 2 mm, during the application. This ensures a longer life expectancy: • This product is UV-resistant.• Because Air-Proof Concrete Treatments is embedded into the support, the product suffers less from harsh weather conditions.After complete evaporation the product migrates to the surface of the stone, thus giving the product its maximum efficiency.