A top coat is a clear or tinted layer of nail polish applied over a base coat and colored polish. Its primary purpose is to protect the underlying layers from chipping, scratching, and fading, while also enhancing the overall shine and finish of the manicure. Top coats can come in various finishes, such as glossy, matte, or satin, allowing for different looks. In addition to nail care, top coats are also used in painting and finishing wood or other surfaces. These coatings provide a protective barrier against moisture, dirt, and wear, ensuring the longevity of the underlying material. Common types of top coats include polyurethane, lacquer, and varnish.