Since 1919, Permoplast has remained the standard for premium, non-hardening modeling clays. Ideal for students at all grade levels.
Permoplast Modeling Clay is excellent for sculpting, creating parting lines for two part molds, and general mold making. This clay contains no sulfur, making it ideal for use with silicone rubbers. Available in 1/4 lb., 3 3/4 lb. and case packages.