Formulated specifically for protecting weapons and tools in adverse conditions, MD Labs XF7 is a truly waterproof grease that lubricates as well as inhibits corrosion. Available from Maxpedition Hard-Use Gear, XF7 will not run, melt or drip even when heated; it remains where it is applied and continues to protect at high cyclic rates and at high temperatures of up to 500 degrees Fahrenheit. XF7 guards metal surfaces in marine and underwater environments; it continues to work even in boiling salt water. Use non-toxic, non-staining, non-corrosive, O-ring friendly XF7 on high performance weapons, tactical knives and tools.