Sulfur-free proto typing modeling material, designed to replace Klean Klay and Roma Plastilina. For model making, sculpting, mold construction and work requiring non-hardening, reusable, self-adhering ultra smooth clay. Unlike the materials it replaces, Protolina contains no sulfur or sulfates making it ideal for use with silicon type mold compounds. Protolina is available in three firmnesses and two colors.
