The 30 Seconds One Step Spray and Walk Away 1 Litre RTU/Remover is designed to use on wood, paint, concrete, brick, paving, cloth and roof materials. Remover produces accurate mixing and facilitates fast application to remove lichen, moss, mould and algae. Hose end deflector offers fan spraying for a wide coverage.The deflector can also be removed to allow spraying for second storeys. Biodegradable is phosphate-free and bleach-free making it safe to use in the garden. Remover can be applied over time without the help of hosing and scrubbing. Slow release exterior requires 4 to 12 weeks for changes to occur.