Johnstone’s Trade Joncryl Water-Based Primer Undercoat is a high-quality, acrylic resin-based combined primer and undercoat formulated for interior use on wood, plaster, hardboard, cement and brickwork. It has superb obliteration and covering power and provides a low-odour, quick-drying, high-opacity alternative to solvent-borne primer and undercoats. Johnstone’s Trade Joncryl Water Based Primer Undercoat will cover approximately 12-14 square metres per litre, depending on the nature and porosity of the surface being painted, and is suitable for interior and exterior use.