ISDIN Si-Nails is a fast-absorbing serum nail strengthener clinically proven to strengthen brittle nails by increasing thickness, density, and durability. This innovative formula delivers visible results in just 14 days with its easy-to-use one-click applicator pen.

Key Benefits:
• Strengthens and repairs brittle nails while increasing hardness, flexibility, and durability
• Promotes keratin and silicon production to improve nail growth and overall quality
• Deeply hydrates nails and cuticles to keep them supple and flexible while reducing roughness

How to Use:
Apply once daily to clean nails using the one-click applicator pen. For first use, activate the brush by pressing down approximately 25 times until moistened; thereafter, click once per nail. Can be applied under or over nail polish for convenient daily care.