For a theatrical production that came through, we were tasked with doing a statue. Instead of carving the body and clothes we used Fosshape. It’s a material that can be sewn or glued, and can be shaped with steam or heat, and when the material is cool it maintains its shape. The material can shrink up t 30% though, so allow for that when using the product. Below are a couple of photos from the shop showing the piece we built.
The same company can has a product called Wonderflex, which would work better in situations where you would typically use Fiberglas, carved foam, or paper mache. It is similar to Celastic, but celastic requires immersion in solvents to become moldable, and Wonderflex uses heat instead. For more information on the history of Celastic & props check out Prop Agenda.