What type of cosmetic is applied over nail polish to prevent chipping?

The correct answer is a sealer. A sealer is a type of cosmetic product that is typically applied as a top coat over nail polish to enhance its shine and create a protective barrier that helps prevent chipping and fading. This additional layer not only enhances the overall appearance of the manicure but also extends the longevity of the color beneath. Sealers are specifically designed to lock in the polish and provide added durability against everyday activities that can lead to wear and tear.

In contrast, a base coat is applied before the nail polish and serves to protect the natural nail and enhance the adherence of the polish. It helps to ensure an even application and can prevent staining of the natural nail from colored polishes.

A nail hardener, on the other hand, is intended to strengthen the natural nail itself, making it less prone to breakage and tearing. While it contributes to the health of the nails, it does not function as a top layer over polish.

Lastly, gloss refers to a finish that can be achieved with various products, but it does not specifically denote a protective layer designed for preventing chipping. While a glossy finish can enhance the look of the nails, it does not consistently serve the protective role that a sealer does.