A top coat is a clear or colored nail polish applied over a base coat and colored polish to enhance the appearance and longevity of a manicure. It provides a protective layer that helps prevent chipping, fading, and damage to the underlying polish. Top coats can also add a glossy or matte finish, depending on the desired look. In addition to nail care, top coats are used in various applications, such as painting and woodworking. In these contexts, a top coat serves as a protective finish that guards against moisture, UV rays, and wear, ensuring the underlying surface remains intact and visually appealing.