A process for preparing a waterborne heat seal coating composition comprising the steps of: a) melt blending ethylene vinyl acetate copolymer, at least one tackifier, and optionally a surfactant in a mixing and conveying zone to form a melt blend; b) contacting the melt blend with an initial aqueous stream comprising a neutralizing agent, water, and optionally a surfactant in an emulsification zone to form a dispersion; and c) diluting the dispersion with water in a dilution zone to form the waterborne heat seal coating composition wherein the process is a continuous process, is disclosed.