Acid-free primer Oxxi Ultra Bond is an innovative primer that significantly enhances the adhesive properties of the nail surface.  It is used in gel polish coating systems, acrylic and gel modeling.  It is a godsend for weak and peeling nails.  It does several functions at once: it creates protection for the nail, extends the durability of the decorative coating, promotes expressive shine, excludes the appearance of yellowness, and prevents the development of a pathogenic environment between the artificial coating and the nail plate.