Polymers expert witnesses may opine on vinyl chloride polymers, electroactive polymers, functional polymers, and more. Here, the International Cast Polymer Alliance defines cast polymer:
Cast Polymer is the umbrella term used to encompass cultured marble, cultured granite, cultured onyx and solid surface products used in a wide range of household and commercial applications. Some of these applications include: counter tops, lavatories, vanities, shower receptors, bathtubs, enclosure sets, fireplace surrounds, window sills, wall panels, floor tiles, whirlpool baths and molding accents.
Cast polymer products are man-made, chemically–bonded, mineral-filled, polymeric materials which are molded and hardened to a solid material in a variety of shapes that meet diverse design needs. The manufacturing process permits a range of uses almost impossible to achieve with quarried stone. Cast polymer is stronger and less brittle than quarried marble; it is more durable than porcelain. Cast polymer products resist mildew and stains and are easily cleaned with non-abrasive cleaning agents. The one-piece, seamless construction of cast polymer is easy to maintain and resistant to breakage.