Product Details: The Permatex Medium Strength Threadlocker is the perfect solution for your nut and bolt applications. This threadlocker has medium strength and is ideal for general use. It prevents rust on threads and reduces the requirement for expensive lock nuts and lock washers to be kept on hand. It locks and seals while preventing vibration induced part slackening. It is ideal for use on all types of metal fasteners including stainless steel, aluminum, brass and plated fasteners. With this product, you can be sure that your nuts and bolts will stay secure and in place. FleetPride is your First Click in Heavy Duty®.