Epoxy hardener HW-8609 is an aliphatic polyamine Mannich base curing agent designed for use with liquid epoxy resin. It is of low viscosity, moisture-tolerant, and reactive at low temperatures (-5°C). It will react with liquid epoxy resins at low temperatures and high humidity to produce a chemical-resistant surface coating. 1. The physical and chemical properties Appearance Yellow liquid Viscosity( BH model CPS/25℃ ) 260 - 450 A mine value ( mgKOH/g ) 280 - 340 Color ( G/H