Mosaic Nail Systems Bond-X is an acid-free bonder which can be used with gel polish, gel and acrylic, it can even be used under traditional nail polish. Bond-X penetrates the nail plate cleaning the ridges of any oils or dirt before filling the ridges with a special kind of gel, leaving the surface layer very sticky. It provides maximum adhesion for all products, eliminates lifting to a minimum and will increase the longevity of the nail enhancement. Does NOT need to be cured separately.