The ProJoint Black Spot & Algae Remover is a professional-grade, ready-to-use cleaning solution designed to tackle tough outdoor stains. It effectively removes black spot, lichen, moss, and other blemishes from various surfaces, including natural stone paving, concrete surfaces, and porcelain tiles. This 5-litre ready-to-use solution requires no pressure washing, saving time and effort. Important usage information: Do not combine with acid-based cleaners as it contains a bleaching action. Not suitable for use in or around fish ponds, aquariums, or on indoor flooring. Avoid contact with metal surfaces. Achieve exceptional results on your outdoor spaces with ProJoint Black Spot Remover.