KastEZ Resin- 2 Part Rapid Cure Casting Resin 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