Solution type polyamide type epoxy curing agent KINGMIDE 300-65 is a polyamide type epoxy curing agent synthesized by polymerized fatty acid and polyamines. The resin component of KINGMIDE 300-65 is designed for high molecule weight and it is therefore semi-solid in its form at an ambient temperature. However, for easy handling at an actual application works, KINGMIDE 300-65 is dissolved in the manufacturing process before being released to the users. KINGMIDE 300-65, when cured with an epoxy resin, provides its cured films with such high orders desired at actual application field as good flexibility, simultaneously with good water resistance and good alkali resistance. KINGMIDE 300-65 is thus desired for heavy duty primer coatings application of anti corrosion resistance. Viscosity (Gardner Holdt/25C degree )- Z ~ Z6.