Dulux Trade Weathershield Quick Dry Exterior Satin is a water-based, mid-sheen finish which is part of a paint system specifically developed to give long lasting protection for exterior wood. Tests show that Weathershield Quick Dry Exterior Satin system will provide extensive protection for up to six years if correctly applied as per the instructions for use. Contains a fungicide to inhibit mould growth on the paint film and help it stay cleaner for longer.