Castle Muscle Grease takes over as a lubricant where lithium and calcium grease leave off. The aluminum complex base of Muscle Grease enables it to excel in heavy load, extreme pressure situations and over a wide range of temperatures (0° F to 350° F) without melting, hardening, or thinning. It is 100% waterproof and resists corrosion from acids, alkalis, and salt. Muscle Grease sprays like a liquid to penetrate and then sets up as durable grease. 3-pack. Warning: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm.