Notpolish New Nail Prep Acid-free PrimerThe Reason for Applying Dehydrator and Primer:Nail Prep Dehydrator & Nail Primer plays an important role in any professional artificial nail application( applying the gel, gel polish and acrylic nail). After applying this set, you can get these effects:1. Acid-free, no burn and no harm to nails;2. Anti-off prevention;3. No lifting;4. Long-lasting for more than 30 days