Finalsan is a natural herbicide for the control of annual weeds, moss and algae. The active ingredients are naturally occurring fatty acids extracted from plants. They are soft on the environment and safe to use. Finalsan will control moss and algae on structural surfaces. Finalsan does not stain concrete, brick or wood surfaces. Finalsan is fast acting and results are seen within hours. Finalsan is safe to use and decomposes rapidly. Finalsan has a scorching action against annual weeds.