F.O.X non-acid ultrabond is the first layer, the base of the entire styling, which ensures perfect adhesion of the artificial material to the nail plate surface. It is the safest preparation of its kind available, as it contains a limited amount of methacrylic acid. It is therefore ideal for sensitive and thin nails. In addition, this preparation degreases the nail plate and does not alter its pH. This acid-free primer has a number of advantages that play a significant role in nail care. It is safe to use; it does not cause burns or allergic reactions. Unlike the acid primer, it is applied prior to the use of gel polish, bio-gel, acrylic-gel and gel. Does not require the use of a UV lamp. Does not affect the deep layers of the nail and does not damage the nail structure. Advantages: Provides excellent adhesion Speeds up the nail designer's work Application is necessary for problematic, thin and splitting nails