FrogLube CLP Paste is a bio-based lubricant. 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. FROGLUBE is safe for plastic, urethane, nylon, and wood. Made in the USA.