Model-Pro Casting' Resin 2 Quarts (64 oz) Polyurethane Resin Make models, prototypes, figurines, proof molds, make reproductions, etc.. Model-Pro turns from liquid to solid in 15 minutes and works excellent in rtv silicone molds Model-Pro is a two component polyurethane casting resin which exhibits good impact resistance and strength. Same Day Shipping This is a 2 Quart Kit containing 64 ounces. You will receive 1 Quart of Side "A" and 1 Quart of Side "B"