Our Green Clean products are safe to use around pets and children once dry. Our outdoor cleaners are very effective at removing greenery such as algae, black mould and moss from many surfaces. These surfaces could include patio and driveway block paving, stone or concrete paving slabs, brick or concrete walls. Decking,timber sheds, wooden surfaces such as fencing and garden furniture. Roof tiles and slates. If you want to read our reviews of the best-selling patio cleaners for removing green algae and moss from paving you can do so here on our paving website. There you can find reviews on many green clean products that you can buy with large discounts of up to 50% off retail prices.