Ronseal Ultimate Dark oak Decking Wood oil, 2.5L. This decking oil provides superior protection for a longer lasting finish. Its unique formula penetrates deeper into the wood to provide increased durability. The lightly tinted finish will give double the weather resistance and foot traffic protection versus standard decking oils, meaning you spend less time maintaining your decking, and have more time to enjoy it!. Revitalise and nourish your decking with this decking oil from Ronseal Simply apply using a brush and leave for 90 minutes to dry. Covers up to 8 m² per litre on average. Decking oil by Ronseal.