Blackfriar Quick Drying Acrylic Primer Undercoat is ideal for use inside and outside the home. It dries quickly, so you can apply a second coat after just 4 hours, enabling you to finish the whole job in one day. It is suitable for bare woodwork, hardboard, masonry, dry plaster and cement. Application method: Brush or spray. Coverage: 14m²/L/CoatTouch Dry: 1-2 hoursHard Dry: 3 daysRecoatable: 4 hours