The Basics An incredibly versatile product, Worbla Thermoplastic is the ideal modeling material to use when constructing costumes.   The Benefits A thermoplastic that's easy to work with, hardens quickly, is sandable and, thanks to extra glue (on the shiny side) it's easy to attach additional components if needed. The Pro Tip A plastic primer or other base coat should be applied if you want to achieve a smooth finish. The Specs                                                    • Small sheet 14.5" x 19.5"       • Medium sheet 19.5" x 29.5"   • Large sheet 29.5" x 39"    • Jumbo sheet 39" x 59" The Bottom Line Heat-formable and solvent-free material that can be used for all kinds of effects and designs.