... material,add fiberglass to enhance strength,assorted design for choice Plaster Cornice: 1) Material: high grade of gypsum powder, fiberglass2) Finish ... , mildew and worm resistant, moisture proof, and sound and heat insulated. It can be processed by sawing, digging, nailing, adhering and ... patching, and therefore it is easy and convenient in construction Plaster Cornice