light-colored transparent low-viscosity modified cycloaliphatic amine epoxy resin hardener 8219 Epoxy hardener 8219 a modified cycloaliphatic polyamine curing agent intended for ambient is a modified cycloaliphatic polyamine curing agent intended for ambient curing of liquid epoxy resin. It has low viscosity and good acid and chemical resistance. Epoxy resin systems cured with 8219 at temperatures above 10 °C show tack-free and colorfast surfaces. It has an outstanding early