Medium density fiberboard (MDF) is a non-structural, interior product that gives you a smooth hard surface, exceptional machining, and clean sharp edges. Although MDF uses much of the same types of recovered and recycled wood waste as Particleboard, it is refined differently using a high energy refiner that acts like a steam pressurized “digester” allowing the raw material to become softened and to actually change physically and chemically. MDF is an excellent substrate that is very smooth, stable, flat, and offers superior design flexibility.