Osmo Anti-Slip Decking Oil is recommended as a top coat after a first coat of Osmo Decking-Oil - to produce a slip resistant and safer decking surface. A satin finish which is extremely water resistant and dirt repellent. The microporous finish is based on natural vegetable oils to allow the wood to breathe and helps regulate the moisture content reducing swelling and shrinkage, the finish will not crack, flake, peel or blister.It is recommended to apply after a pigmented finish however if applying after a clear treatment, the wood naturally greys over time.