Sculpture Pro is an oil based clay made by Clay World. It can be used for sculptures, industrial design, architecture, mold making rapid prototyping.
Sculpture pro conditions  very quickly in your hand. 

It is an easy material to work with, despite being intended for professional use, so you can quickly pick up this material and get started experimenting with it. It will warm up fairly quickly in your hands and can be reheated to be reused another day. Sculpture Pro adheres to wiring and armature easily, which makes it fantastic for creating figurines and sculptures using a framework. It is also free of any sulfur, making it safe for quickly preparing molds and prototypes. Generally speaking this is a great, versatile material that gives you professional-grade results without being finicky. You can do a great deal with this clay and have fun working with it to create high-quality products. For anyone looking to get more involved with professional tier materials and advance their skills, the Sculpture Pro clay is a great place to begin.