Poly 1512 SeriesPourable casting resins. Poly 15 Series liquid plastics are useful for production of decorative objects, parts, lightweight mold shells, tools, models, patterns, fixtures, duplicate masters, vacuum forming molds and general tooling use. Poly 15 6, 1512, and 1512X have the feel and density of wood or thermoplastics. Poly 1512 Clear is useful for casting transparent parts or for pigmenting color casting. For bubble free, clear castings, best results are