Castaldo® Mold Cream ™makes powder separation molds even easier! It is more effective at separating a mold into two halves than the use of surgical knives or dusting powder.To use Castaldo® Mold Cream™, spread a small amount on both surfaces of the mold with a finger and then vulcanize normally. After vulcanization, the mold can be pulled open by hand without cutting. Sold in 1oz. container.