Blackboard 250 ml Midnight Blue (5031) 421650310 A matt blackboard paint, suitable for all porous ground such as stone, wood, plastered walls, etc. The paint produces a strong surface that is resistant to wear. After 48 hours it is water resistant, allowing it to be wiped clean with a damp cloth. The paint flows very easily. This allows a very smooth surface to be created, which is highly suitable for drawing and writing on with chalk. Make sure it’s grease free before application. No primer needed. Paint 2-3 layers and let it dry for 30-45 min. between each layer. Apply the paint with a soft flat brush or a smooth roller and clean it with warm water. Coverage: 7 m²/L.