A standard polyamide amine hardener HWD-125 used in Coating/ adhesion/ civil engineering and structural fields Polyamide Epoxy Resin HWD-125 is a standard polyamide amine hardener composed of dimer acid and polyamine , which cures with epoxy resin at room temperature. HWD-125 provides cured resin with good flexibility and adhesive properties, which is mainly used for coating , adhesive, civil engineering and structural fields. Characteristics Less toxicity. Wider range of