Octoral H24 HS420 Hardener is a high-quality hardener designed for use with Octoral's HS420 premium 2K topcoats and clearcoats. Engineered to deliver optimal curing performance and excellent flow, it is ideal for professional automotive refinishing applications requiring high gloss and durability. This 1-liter hardener ensures consistent results, meeting VOC compliance standards when used as part of a compliant system.