Bernyl Unisurfacer is a fast drying, post-catalyzed, acid cured primer for interior MDF and interior solid woodwork. It has extremely good coverage and provides good hold-out of the top coat. Using Bernyl Unisurfacer provides a high solids primer with excellent filling and sanding characteristics. Top coating Bernyl Unisurfacer with Matador provides a superior finishing system. It can be tinted and has low HAPS.