U-POL's System 20 S2021 Ultra High Solid High Build Grey Primer is a versatile two-in-one primer, offering high adhesion and corrosion resistance. This fast-drying primer, comprising a primer filler and primer surfacer, is suitable for spot repairs to full-panel applications, providing you with a high-quality solution for your automotive refinishing needs.
The primer's compatibility with a range of substrates, including mild steel, original paint, E-coat, SMC, and U-POL polyester fillers, ensures its adaptability to different repair scenarios. It is also compatible with S2030 or S2032 hardeners, with a mixing ratio of five-part primer to one-part hardener.