Remove black spots and make your surfaces bright with the SmartSeal Xtreme Blackspot Remover. It is a fast acting, high-performance cleaning product with four powerful active ingredients. It offers a simple way to keep surfaces clean, often avoiding the need for pressure washing. This product will remove stubborn black spots and unsightly algae and is ideal for cleaning natural stone, block paving and paving slabs. This black spot remover is easy to apply and you can use it directly without diluting for superb coverage and excellent results. Experience the convenience of targeted cleaning and remove the black spots, green algae and lichen with ease. This product becomes inactive once dry, so it is important that the surface remains wet throughout the 60-minute cleaning period. Most ingrained organic matter and grime will be removed after one application but sometimes a second application may be required. This product comes in a 5L pack. You can treat approximately 20 m² of your patio with just five litres of this formula. This black spot remover contains chlorine as an active ingredient and will stain fabrics and sensitive materials. Take care to avoid contact with fabrics during application. Toxic to aquatic life, wear protective gloves and goggles at all times. Xtreme Black Spot Remover can cause skin burns, avoid contact with the eyes. Keep out of the reach of children.