Nail primer is a product used in the process of applying acrylic or gel nails. It is a degreasing liquid that is applied to the natural nail before placing the acrylic or gel material.

The primer helps remove grease and moisture from the nail, preparing it for the building material to adhere more effectively and lastingly. In addition, the primer also helps prevent the formation of fungi and bacteria on the natural nail. It is an important step in the artificial nail application process to ensure optimal adhesion and a long-lasting finish.