Fast cast is a two-component urethane casting resin, which turns white once set. Easy to use, 1:1 ratio and is odorless. Ideal for casting, prototyping, miniatures, models, taxidermy and more. Fastcast sets to a hard cast in approximately 10 minutes at 70 degrees Fahrenheit. Once cured, FastCast can be drilled, sanded, shaped and painted. It can also be colored with casting' craft opaque pigments and transparent dyes. Kit contains 8 oz. Part a & 8 oz. Part B (16 oz. Total).