Plastaform

Plastaform is a type of material used by the Romulans in the interior construction of their Bird-of-Prey.

In an attempt to deceive the crew of the USS Enterprise, the commander of the Praetor's flagship jettisoned all debris from his ship, including metal molds, conduit, plastaforms, and the body of a centurion who had died in the attack. (TOS: "Balance of Terror")