Polyamide curing agent DH-115S for vehicle and rail coating Description DH-115S is a polyamide epoxy hardener used in vehicle and rail anti-corrosion coating systems. It delivers strong adhesion, long pot life, and dependable chemical and water resistance. Recommended for vehicle chassis, railway cars, and transit steel structures. Specifications DH-115S Unit Value Appearance / Amber liquid Color Gardener 9 max A.H.E. W g/eq 200 Amine value mgKOH/g 180-220 Viscosity (40℃ )