KastEZ Resin is a two part polyurethane casting system. KastEZ Resin is mixed one to one by volume and cures at room temperature. It produces a lower exothermic temperature than most comparable resins, begins to gel in 1.5 minutes, and cures to a white color. When hardened, the resin is scratch resistant. It captures high detail and has very low shrinkage when curing. Will make castings from rigid and flexible molds. 16 oz package.