Cast urethane usually comes up with master pattern making, silicon mold and pouring urethane. Because of inexpensive tooling cost comparing to injection mold, cast urethane is usually used for small qty parts or prototype production. Pepsen uses this process for many products such as urethane concrete stamp, PU floor bunding, other complicated parts and parts with de-molding issues. Another definition ofcast urethane parts(with respect to polyurethane injection process, polyurethane spraying process or polyurethane foaming) means parts made by mixing raw materials and pouring/casting urethane into molds, no matter molds are made of silicon or metal.