Polystyrene Cornice is a kind of Decorative Cornice, Polystyrene Cornice advantages: High density and easy-to-fit lightweight Polystyrene coving that provides a perfect smooth finish. Easy and quick installation by one person. Styrofoam Cornice also called EPS Foam Cornice, used of expanded polystyrene as a base material, Manufactured in different thickness and length to meet almost any thermal installation requirement in the temprature range -30 to 60 degree celsius.