A non water-based clay that is ready to use, smooth and pliable, and retains its plasticity indefinitely.
Permoplast Modeling Clay For more than seventy years, Permoplast has remained the standard for first quality, non-hardening, plastic modeling clay. This medium is ready to use and is available in gray and cream colours. Permoplast remains smooth and pliable and retains its plasticity indefinitely. Cream is especially formulated for industrial use in making molds. Sulfur free.