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  • Si-Nails

ISDIN Si-Nails is an innovative nail growth formula that has been clinically proven to strengthen brittle nails by increasing thickness, density, and durability of the nail and cuticle. Si-Nails nail strengthener is a clear, lightweight serum delivered by an easy-to-use, one-click applicator pen, applied once a day. Visible results in just 14 days.


  • Strength: Increases nail strength and durability while helping to repair brittle nails and reduce roughness.
  • Growth: Promotes keratin and silicon in the nails to help improve growth, and overall quality.
  • Moisture: Hydrates the nails and cuticles, moisturizing the entire nail structure to keep nails supple and flexible.
  • Fragrance free
  • Fast-absorbing
  • Invisible finish


  • Step 1 - Apply nail repair serum to the nail and cuticle, covering the nail edges
  • Step 2 - Apply in vertical strokes across the entire nail surface
  • Step 3 - Apply underneath the nail.
  • Step 4 - Click! Repeat steps 1-3 for each nail the treatment is applied to.


  • Silanediol salicylate - promotes silicon, which is one of the predominant minerals in the nail.
  • Pistacia lentiscus gum - promotes keratin, an essential component to strong and healthy nails.
  • Cationic hyaluronic acid - an enhanced version of one of the most well-known moisturizers in the world, which promotes cuticle moisturization.

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  • $36.00