Primed pine boards are finger-jointed and edge glued pieces of upper-grade pine assembled to create a solid board. The primer is applied to all four sides and ends to improve dimensional stability. The primer coating hides any joint lines, creating a smooth, ready-to-paint surface on one face and two edges. Primed pine boards are great to use as craftsman-style window and door casing trim, craft projects, and other projects around your home or office.