Ronseal decking oil is a durable scuff resistant tinted oil that forms a waterproof barrier to protect against weathering warping swelling drying and splitting it resists mould and algae growth and its fade resistant finish protects against uv rays for use on hardwood and softwood decking coveragea 25 litre pack is normally sufficient to coat a deck 10 12m with 2 coats of decking oil coverage will vary with absorbency of timber and profile of deck areas of use hardwood and soft wood decking app