This system features the rigidity of a structural plastic with the castability of a typical two-component polyurethane elastomer system. In addition to being castable, Andurset M-77D offers several advantages over typical thermoplastics which include low tooling cost and the ability to cast large and thick-section parts. The Andurset M-77D, Part A contains diphenylmethane diisocyanate (MDI) is inherently safer to work with than Andurset T-80D, Part A, that contains toluene diisocyanate which is a hazardous component.