Seals can be used for various purposes. Here are some common application areas:

1. Mechanical Engineering: Seals are widely used in machinery and engineering to prevent leakage of liquids, gases, or dust. They can be used in bearings, valves, pipe joints, piston seals, pumps, and other mechanical components.
2. Automotive Industry: In car manufacturing and maintenance, seals are used in critical components such as engines, transmission systems, braking systems, fuel systems, and cooling systems to ensure sealing performance and prevent leaks.
3. Chemical Industry: In chemical production processes, seals are used in chemical pipelines, tanks, reactors, and valves to ensure safety and efficiency in handling liquids and gases.
4. Food and Pharmaceutical Industry: Seals are extensively used in food processing and pharmaceutical processes to ensure product quality and prevent contamination. They are commonly used in sealing containers, pipelines, and filling machinery.

5. Hydraulic and Pneumatic Systems: Seals play a vital role in hydraulic and pneumatic equipment, ensuring system sealing performance and preventing leaks and energy loss.
6. Medical Equipment: In the medical industry, seals are used in various devices such as medical instruments, surgical equipment, and laboratory instruments to meet strict hygiene requirements and prevent cross-contamination.
7. Electronics and Electrical Equipment: In electronic and electrical equipment, seals are used to protect circuit boards, connectors, and cable joints from dust, moisture, and other environmental factors that can damage electronic components.

These are just some common applications, and seals are widely used in many other industries and applications. Depending on specific application requirements, seals can be made from different materials and designs to meet various environmental conditions and work demands.