POLYFORM-Sculpey Work 'n Bake Clay Mat. This mat is made of non-skid silicone and is designed to protect surfaces while you create! It's perfect for all kinds of clay projects and allows you to bake your clay creations right on the mat! It clean easily with soap and water and is safe for use up to 550 degrees Fahrenheit. Not for food use. This package contains one 15-1/2x11-1/2 inch mat. Imported.