AC-90 is the No. 1 choice multipurpose lubricant. AC-90 is an industrial spray lubricant. AC-90 does not contain Silicone or CFC’s. AC-90 will penetrate and release rusty and/or jammed components. AC-90 displaces moisture from vehicle ignitions systems and aids starting and smooth running. Simply spray AC-90 over the exterior of all distributor leads, spark plug leads and all electrical components to prevent moisture induced faults.