Super Flexible Wood Primer And Undercoat White - 750ml Hides bold colours and dark marks Flexes with the wood so it won�t crack or peel Suitable for exterior smooth wood Drying time: touch dry in 2 hours Ronseal wood primer gives you a smooth finish to help paint stick and last longer. It can cover bold colours and dark marks and when used with our 10 Year Weatherproof Paint, it�ll last an entire decade. Suitable for use on exterior smooth wood including doors & windows. Apply with a brush.