This clinically tested strength treatment builds stronger natural nails proven to be noticeably healthier and more resistant to breaking, splitting, cracking and peeling in just 3 days. Our best essie formula to reduce damage caused by UV gels. MSM technology fortifies and conditions damaged, soft nails for protection without the harmful use of formaldehyde. Use by applying two coats to clean, bare nails and allow to dry. Improves nail brittleness and leaves nails looking smooth and rejuvenated.