8-450 Hs420 Hardener Medium

Medium hardener formulated for HS420 clearcoat and HS primers, and suitable for fillers and surfacers. Designed for spraying large areas and use at elevated temperatures, it also acts as a curing agent in sanding and non-sanding fillers. As a UHS hardener it provides low viscosity with a high solid content while meeting VOC requirements — ideal for high-build, professional refinishing applications.