S-005 Green RubberGreen Rubber 16" x 20" inch piece Heat Conductive Rubber is a unique closed cell silicone sponge that has very fine ceramic particles mixed in the polymer to enhance its thermal properties. This expanded, conductive rubber helps distribute pressure and protect delicate materials in the heat press. The rubber mounts between the teflon and the platen. Adding the Green Rubber allows you to print and stamp over the seams. You can now matte fibers and cure