Notpolish New Nail Prep Acid-free Primer The 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