Ronseal Decking Oil Natural Oak 2.5L both nourishes and protects your decking, leaving a lightly tinted, natural looking finish. It provides a protective barrier against water penetration where constant weathering can cause swelling and warping. It is rainproof in 2 hours, and can be given another coat in just 6 hours. Simply apply this product using a brush to your decking. Covers up to 8 m² per litre on average.