- Worbla's Finest Art (Original) : Incredibly easy to use with an activation temperature of 90°C, Worbla becomes soft and pliable, allowing you to shape, form and mold the product by hand safely. Pieces can be joined without glue. Scraps can be blended for zero waste. Leftovers can be molded like putty. Many artists use Worbla's Finest Art instead of clay to create near-indestructible pieces. Non-Toxic, Skin-Safe. You use hot air, water or steam to shape the plastic however you want. - Worbla's Black Art has a longer working time and a smoother finished surface, compared to Finest Art, and can take and create incredibly small detail. It has slightly less adhesive working time than Finest Art, so joining pieces requires both sides to be close to the 90°C for the best adhesion.