Developed in 1988 Prosthetic Cosmetic is a Castor oil based rubber mask grease foundation for use as a prosthetic makeup. This make up is used to conceal latex prosthetics as it does not change color from skin to latex. Apply with a brush or sponge. Set with powder. It can be mixed with Silicolor to make a quick Alcohol Activated fixed foundation that is smudgeproof, waterproof, and sweatproof, yet removable with soap and water.