How To Seal Mdf For Painting. Prime and seal mdf (medium density fiberboard) for a better paint finish for projects including dolls houses and displays. Submitted 6 years ago by shustybang. Seal the edges with drywall putty to ensure a consistent coat when painting medium density fiberboard.
It has the tendency to absorb all the paint and leave an uneven surface.materials and tools apply a thin, even layer of wood glue to seal the pores of the mdf.
While you can use a few different sealers and primers to get the job done, the most. For any painted cabinets, furniture, wall paneling, and some molding, mdf is a great choice of material. Sand the surface and edges using an orbital sander with 180 grit sandpaper. It's really nice to paint art on if it is primed and sealed well all around. For the last step, take a third, clean brush and apply a sealant. The method required to paint mdf successfully is similar to that used on other timber based materials, the differences are due to the a) mdf stands for medium density fibreboard. Use an oil based primer. Not the answer you're looking for?