Coolants are substances used to regulate temperature in various systems, primarily in engines and industrial machinery. They absorb heat and help maintain optimal operating temperatures, preventing overheating and ensuring efficient performance. Common types of coolants include water, antifreeze, and specialized chemical mixtures. In automotive applications, coolants circulate through the engine and radiator, transferring heat away from critical components. This process is essential for maintaining engine efficiency and longevity. Proper coolant maintenance, including regular checks and replacements, is crucial for preventing engine damage and ensuring reliable operation in vehicles and machinery.