Low Viscosity And No Discoloration Building Structure Adhesive Material Epoxy Resin Hardener HWR-3158 Curing agent HWR-3108 is aliphatic amine epoxy hardeners. The curing agent has low viscosity, high activity, no discoloration, non-stick coating surface, low oil surface, high strength properties. 1.The physical and chemical properties Color(G) 2 Viscosity(mPa.s/25℃) 1000-2000 Amine value (mgKOH/g) 370±20 The amount of resin added in 100g (E51) 50-60 Gel time min(25℃&150g) 15