Acrylic Cast Clear Sheet is entirely composed of PMMA, a thermoplastic polymer obtained by bulk-monomer polymerization by casting processes. Acrylic Cast Clear Sheet is manufactured using the most innovative and advanced technologies resulting in a product with characteristics including outstanding optical properties (regardless of thickness), extreme purity and excellent weather and chemical resistance. Typical fields of application for Acrylic Sheet include aquarium panels, noise barriers and furniture and interior design. Acrylic Sheet is a material well suited to CNC routing, Thermoforming and CNC Milling (to achieve a zero tolerance on thickness). NOTE; For more information on our Acrylic Block certified (PVHO-1) and guaranteed for underwater use please contact us directly to discuss your underwater project. Our aquarium certified sheets have a 30 year guarantee against yellowing. If you have a requirement for machined or finished Acrylic components please ask the Plastock team for more information.