Dehydrated Castor Oil (DCO): An Industrial Powerhouse for Enhanced Performance Imagine a castor oil that has been stripped down to its core, with its water content completely removed, resulting in a potent concentrate. This is what dehydrated castor oil (DCO) offers â?? a champion of efficiency and performance in the industrial world. Unlike its liquid counterparts, DCO provides a higher concentration of castor oil's valuable properties in a smaller package, making it a force to be reckoned with.