FrogLube CLP Liquid - 4 oz. BottleFROGLUBE is a cutting edge biodegradable lubricant made from USDA Certified Food Grade. All ingredients are produced in the USA using a proprietary formula. It is a non toxic substance that dissolves carbon on contact. It has a heavy specific gravity, which enables it to season the metal by absorption deep into the pores. Using FROGLUBE results in a durable dry slick wax like surface that reduces friction, eliminates fouling, and destroys rust.