Atmospheric agents cause the onset of mold stains, algae and MOSS on surfaces of natural stone, stucco, masonry, etc. HG gravestones cleaner removes thoroughly and hassle free deposits, dirt and stains caused by pollution and by bird droppings from gravestones, stucco and marble walls, blue granite and other natural stones. Spray detergent for HG gravestones in dirty points from about 5 cm away and let the product penetrate for about 25 minutes. Remove any residue with a cloth or brush, then rinse the surface with plenty of water. On surfaces with particularly stubborn stains, repeat the treatment after 30 minutes. Half a litre is sufficient for approx. 3 m² surface.