Dulux Trade Weathershield Exterior Flexible Undercoat (Oil-Based) provides 8 year weathering durability, when used as part of the full Weathershield exterior paint system. Can be mixed into thousands of colours including RAL & BS colours. With excellent flexibility and adhesion the solvent based exterior undercoat is suitable exterior woodwork surfaces. To be used alongside other Dulux Weathershield products for the best results. Key Features: Mixed into colours 8 years protection High coverage Use on exterior woodwork Excellent flexibility and adhesion