Cuprinol UV guard Natural cedar Matt Decking Wood oil, 2.5L. This decking oil & protector can be brushed or spray applied to penetrate deep into the wood, replacing the natural oils and resins that are lost during weathering. Its tinted formula enhances and revitalises the natural look of your decking.. Revitalise and nourish your decking with this decking oil from Cuprinol Simply apply using a brush and leave for 6 hours to dry. Covers up to 8 m² per litre on average. Decking oil & protector by Cuprinol.