Crystal CRW 4100 Product Overview Crystal CRW 4100 is a water-based mold release agent suitable for a variety of molding applications. Crystal CRW-4100 is suitable for the molding of medium and high-density urethane foams and elastomers, as a release agent for the molding of elastomeric belting, and for the release of MDI bound recycled rubber components. Depending on application Crystal CRW-4100 can be used as is or diluted to an appropriate strength. Brand Net Fill Crystal 5 Gallon Technical Data Sheet Safety Data Sheet