[Epacy]

Originally Posted by GregW / Oregon

That fits the description of SMC (Sheet Molding Compound).

SMC Definition: A fiber glass reinforced thermosetting compound in sheet form, usually rolled into coils interleaved with plastic film to prevent autoadhesion. Made by dispensing mixed resin, fillers, maturation agent, catalyst and mold release agent onto two moving sheets of polyethylene film. The lower one also contains chopped glass roving or glass mat. SMC can be molded into complex shapes with little scrap.

Gotcha.