A gasket is a mechanical seal used to fill the space between two or more mating surfaces, preventing leakage of fluids or gases. They are commonly made from materials like rubber, cork, or metal and are essential in various applications, including engines, pipes, and machinery. Gaskets ensure that components fit tightly together, maintaining pressure and preventing contamination. Gaskets come in different shapes and sizes, tailored to specific needs. For example, automotive gaskets are crucial in internal combustion engines to seal oil and coolant passages. Proper installation and maintenance of gaskets are vital for the efficiency and longevity of the equipment they protect.