Sealing devices are tools or materials used to create a barrier that prevents the passage of fluids, gases, or contaminants. Common examples include gaskets, O-rings, and sealants, which are often used in various industries such as automotive, construction, and manufacturing. These devices ensure that systems operate efficiently and safely by maintaining pressure and preventing leaks. The effectiveness of sealing devices depends on factors like material compatibility, temperature, and pressure conditions. Proper installation and maintenance are crucial for their performance. Regular inspections can help identify wear or damage, ensuring that systems remain secure and functional over time.