Protective coatings are specialized layers applied to surfaces to shield them from damage caused by environmental factors, such as moisture, chemicals, and abrasion. These coatings can be found on various materials, including metals, plastics, and wood, and are commonly used in industries like construction, automotive, and aerospace. The main purpose of protective coatings is to extend the lifespan of the underlying material and maintain its appearance. Common types of protective coatings include paints, varnishes, and sealants, each designed for specific applications and conditions. Proper application and maintenance of these coatings are essential for optimal performance.