Castor wax is hydrogenated castor oil, which creates hard brittle vegetable wax. It is odorless and insoluble in water and is similar to soy wax but has a higher melting point. Castor wax is used in polishes and cosmetics as well as other uses, this vegetable wax comes in a white flake form and has a melting point of 90 degrees Celsius/ 190 degrees Fahrenheit. Castor Wax Flakes Can be liquefied to combine with other ingredients and then cooled to re-harden into the product of your choice.