Mar-Hyde™ 4.4 Ultimate 2K high speed primer surfacer adds smoothness and efficiency to your collision repair paint jobs. It creates a high build film that fills in sand scratches and other impurities in most any vehicle substrate that forms a smooth surface for paint topcoats. It also dries very fast, reducing the cure time to 1 hr for faster shop throughput. The film coating fully applied to 3 mils can be sanded and top-coated in as little as 1 hr better finished paint jobs. Formulated for excellent adhesion, easy sanding and excellent color holdout, Mar-Hyde™ 4.4 Ultimate 2K high speed primer surfacer is a two component (2K) system that's integral to a truly professional-grade collision repair paint job. The primer surfacer applies easily to virtually any vehicle substrate including steel, aluminum, iron, fiberglass and previously painted surfaces, especially if the surface is prepared using Mar-Hyde™ single stage self-etching pre-treatment primer. This surfacer delivers excellent adhesion, filling in small imperfections in the sanded surface and forming a smooth film coating that accepts any vehicle paint system. Buff, gray or black color surfacer delivers long-lasting color holdout for the finished paint job.