Dulux Trade Weathershield Quick Dry Exterior Undercoat, Pure Brilliant White, specifically formulated to be used with Weathershield top coats to provide longer lasting protection for exterior woodwork. Its water-based formulation is quick drying and offers great flexibility to help absorb the natural movement of wood. Provides 6 year all weather protection when used as part of the full Weathershield exterior paint system. Quick dry exterior undercoat is Part 2 of a 3 part weather resistant and flexible paint system from Dulux Trade. Provides 6 year weathering durability, when used as part of the full Weathershield exterior paint system. This coat is Part 2, of a 3 part weather resistant and flexible paint system from Dulux Trade. Part 1 is preservative primer, Part 2 is the paint undercoat and Part 3 is the final gloss coat. Exterior quick dry undercoat is touch dry in 2 hours and re-coatable in up to 4 hours. Coverage up to 16sq/m per litre, thinning is not recommended.