Our Pro-X Non-Acidic Primer is used after applying our Nail Dehydrator. NO MORE STINGING OR BURNING! Our Acid Free Primer creates a tacky surface on the natural nail for a stronger retention when combined with our Pro-X Full Coverage Nail Tips! Our Non-Acidic Primer is Anti-lifting and enhances adhesion! Follow Instructions on the back of the bottle for a longer lasting Pro-X Application.