Techniseal® organic stain remover is formulated to remove moss and mildew as well as tough organic stains such as dead leaves, blood, wine and non-greasy food stains on concrete pavers, slabs and walls, natural stone, poured or stamped concrete, etc. Techniseal® organic stain remover works without damaging or discoloring the material. It can safely remove the toughest stains. It is recommended for bare and sealed surfaces.