This specially designed Blackboard paint makes the perfect writing surface for Liquid Chalk Markers.It transforms old and worn blackboards or can be painted directly onto walls giving you a fresh clean surface for your message.The Rainbow water-based Blackboard & Chalkboard paint is a matt black paint which will give you a smooth non-reflective finish.Product features: Capacity 250ml Weight 330g For interior or exterior use Suitable for wood metal and green mdf surfaces In some cases only need to apply one coat to bare wood surface Suitable for Liquid Chalk and traditional dry chalk sticks Non-reflective and hardwearing for external walls