A versatile material mainly manufactured to act as a former during glass fibre laminations. Once glassed over it will provide stiffening ribs to the structure.

It also has many other uses; use it to create curved mouldings, to add texture and bulk to trees and branches, and to add relief to any surface.

It can be fire proofed with Flamebar type S1WA2, and textured with Idenden or FlintsMud.

I have heard it is also used for pyrotechnic fuses.