Our Deco-Form® Medium Density Fiberboard (MDF) doors are an excellent choice when selecting a door for a painted project. Made of approximately 90% wood fibers and 10% resin to hold it together, MDF maximizes the use of our forest resources by utilizing the residual wood element of forests not used in producing lumber, which could have otherwise ended up in landfills. They won't twist or crack, and have a high dent resistance.