As the name indicates this is synthetic grease, formulated with a patented boron-based ingredient. No other products offer this technology, which creates a micro-layer of extremely low friction, crystal lattice molecular structures that bond with metallic surfaces. It is this process which creates the lubricity which reduces wear, enhances performance and improves energy efficiency. Synthetic Greases have a wide range of applications. Synthetic Grease #2 is formulated to seal out water and lubricate under the most adverse conditions. The highly adhesive and extreme pressure/extreme temperature properties prevent metal-to-metal contact in most applications and provide a long-lasting, low-friction surface impervious to most contaminants. Boron CLS Bond is biodegradable. 14 oz (414 ml) US Patent # 5,431,830