KMK's 1K Primer Surfacer is a general-use primer filler with quick-drying and high-filling properties that promote strong adhesion and create an ideal surface for effortless sanding. The non-absorbing primer, with its high build properties, can fill in slight imperfections and always leaves behind a smooth surface resistant to forming rust. This primer can be top-coated with nitrocellulose, synthetic and acrylic finish.