Basic introduction of dust seal The dust seal is a rubber seal ring for vehicles, machinery, construction machinery, and special purpose to prevent the intrusion of dust and dirt. The dust seal is generally used with a rubber rubber ring. It is used in some mechanical equipment and hydraulic piston systems, and is installed at the mechanical connection to prevent external dust and dirt from entering the equipment, especially in harsh environments. Large excavator dozers require a large amount of dust-proof packaging on the four-wheel, hydraulic system to prevent sand intrusion and protect machinery.