Barrettine says its anti-slip top coat decking oil is a premium quality top coat oil, incorporating anti-slip technology, which improves grip on decking, handrails and wooden steps. It oils and protects, providing a low-sheen finish. With added UV stabilisers, it helps to slow wood turning grey and resists flaking or cracking with excellent water beading. Barrettine anti-slip top coat oil also contains a surface biocide to protect against fungal and mould attack.