The CRC Technician Grade Knock'er Loose® Lubricant Penetrant 18 Wt Ounce is a powerful and long lasting lubricant that protects against future corrosion. This fast-acting penetrant works rapidly to dissolve and remove rust, freeing up stuck bolts, hinges, nuts and exhaust clamps. It is formulated with a special blend of solvents and lubricants that penetrate quickly and deeply to loosen rusted parts. The lubricant also helps to prevent future rust and corrosion, making it ideal for use in automotive, marine, industrial and agricultural applications. FleetPride is your First Click in Heavy Duty®.