What type of product is usually applied as a top layer to protect nail polish?

The type of product typically applied as a top layer to protect nail polish is known as a top coat. This product serves several important functions. Primarily, it provides a protective shield over the nail polish, helping to prevent chipping and extending the wear of the manicure. In addition to enhancing durability, a top coat can also add shine and create a smooth finish, making the polish appear more vibrant and polished.

While a base coat is applied before the nail polish to protect the nails from staining and improve adhesion, and a nail strengthener is used to reinforce weak or brittle nails, these products serve different purposes in the manicure process. A nail primer, on the other hand, is used to enhance the adherence of nail enhancements but is not related to the protection of nail polish once applied.