FastCast is a two-component urethane casting resin that sets to a hard cast in approximately 10 minutes. This easy to use, odorless resin has a two-minute working time, ideal for quick prototypes, miniatures, models, taxidermy, and more. It starts out clear and turns opaque white when set. Castin'Craft FastCast can be sanded, shaped, carved, drilled, or painted. The two components in the kit should be mixed in a 1:1 ratio.