The Blackfriar BKFMDFP250 Quick Drying MDF Acrylic Primer Undercoat comes in the following: Size: 250ml. Blackfriar Quick Drying MDF is a primer and undercoat especially designed for use on MDF. Its easy to use and dries quickly so you can prime, undercoat and finish all in one day. It can be overcoated with a choice of finishes including gloss, emulsion and satins. Perfect for pre-decoration and has a white finish. Application method: brush, roller spray. Coverage: 14m/L/Coat. Touch Dry: 1-2 hours. Hard Dry: 3 days. Recoatable: 4 hours.