A high-performance aqueous PVDC (polyvinylidene chloride) emulsion that,　on drying, forms a thin film characterized by high barrier to oxygen and other gases and to water vapor, together with outstanding heat- and radiofrequency-seal properties, flame retardance, and oil and chemical resistance. Asahi Kasei PVDC latex is widely used to coat films made from oriented polypropylene (OPP), polyethylene terephthalate (PET), nylon (Ny), and polyvinyl chloride (PVC).