Dulux Trade Quick Drying Wood Primer Undercoat is a water-based, high opacity, dual purpose primer undercoat for interior and exterior woodwork, which is recoatable in 2-4 hours. It is ideal for use as a primer for softwoods, hardwoods, chipboard and fibre board (except fire retardant-treated types). Dulux Trade Quick Dry Wood Primer Undercoat can also be used as an undercoat for woodwork that has been previously primed or painted with either solvent- or water-based paint.