duri Rejuvacote 2 Nail Growth System Base and Top Coat - Nails Hardening Repair Chipping Strengthen Breaking and Brittle Treatment Rejuvacote 2 0.15 lb is our sensitive formula: formulated without DBP toluene and formaldehyde for health-conscious people and people with sensitive nails. Creates a protective layer over nails for faster nail growth. Enriched with vitamins that help natural nail growth. Increases wearability when used with duri nail polishes. Seals in moisture collagen and fatty acids naturally produced by your nail plate. When used according to directions Rejuvacote 2 promotes nail hardening reduces brittleness minimizes chipping and prevents breaking. Only works on natural nails.