This NEW, super concentrated, extreme MOSS KILLER & black spot remover is all you need to eradicate even the most stubborn and unsightly black spots from around your garden - clean your patio, paths, Indian sandstone, block paving, and so much more with ease. • For use on For Use On Your Patio, Stone, Block Paving, Indian Sandstone etc • extremely easy to use. Using a pressure sprayer, apply the solution • For Use On Your Patio, Stone, Block Paving, Indian Sandstone etc