Kneadatite is a two-part, air-drying compound. It’s primarily designed as a plumber’s epoxy, but artisans have found it to be a great sculpting medium. When mixed, it is pliable and holds its shape. It cures in about four hours with a consistency not unlike PVC plastic. I prefer air-drying over heat-drying mediums as I don’t risk heat damage to the base figures. (Some of my earlier projects were destroyed in the oven while trying to cure Sculpey.) Also, Kneadatite is very durable when dried. It has a slight flexibility that allows it to “give” under pressure without snapping. For more information about Kneadatite, please visit the manufacturer’s site polymerics.com.