Epoxy hardener HW- 8618 is a modified cycloaliphatic amine curing agent, which has the advantages of low viscosity, high activity, light color, non-sticky pa int film surface, high gloss, moisture absorption resistance, and no yellowing. The cured produc t has excellent chemical resistance, toughness, and mechanical p roperties. 1. The physical and chemical properties . Appearance Colorless transparen t liquid Viscosity ( BH model CPS /25℃ ) 300~500 Amine value (mgKOH/g) 275