Isdinceutics SI Nails


Fast-absorbing serum nail strengthener

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. Visible results in just 14 days.

Size: 2.5 mL

Main ingredients: Silanediol salicylate, pistacia lentiscus gum, cationic hyaluronic acid

Good to know: Fragrance free, fast-absorbing, invisible finish

Awards: Realsimple Road Test

Skin concern: Brittle nails

SI-NAILS strengthens your nails with an invisible finish that is easy to apply. Thanks to its combination of ingredients, it supplies your nails with more keratin, more hydration, more silicon and more protection. Product highlights: 

  • Promotes nail growth, increases their resilience, helping to prevent breakage.
  • Supports remineralization and restructuring of nails by increasing the quantity and quality of silicon and keratin.
  • Invisible, easy-to-apply finish that restores the natural appearance of nails and cuticles.


Improves nail hardness and flexibility

Si-Nails is a fast-absorbing serum nail strengthener which uses a unique combination of effective ingredients to promote healthy, strong nails.



Increases nail strength and durability while helping to repair brittle nails and reduce roughness.



Promotes keratin and silicon in the nails to help improve growth, and overall quality.



Hydrates the nails and cuticles, moisturizing the entire nail structure to keep nails supple and flexible.


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.


Si-Nails nail strengthener is a clear, lightweight serum delivered by an easy-to-use, one-click applicator pen, applied once a day. Use on dry, bare nails for best nail repair results. The first time you use ISDIN Si-Nails, activate the brush by pressing down on the applicator until the brush is moistened (approximately 25 times). Visible results may be seen in 14 days, with best results achieved from ongoing application. Use only on the nail, and wipe off any excess product from the skin.


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.


Full ingredients list
Ingredients:Water, Alcohol Denat., PEG-40 Hydrogenated Castor Oil, Butylene Glycol, Acrylates Copolymer, Silanediol Salicylate, Tromethamine, Caprylic/Capric Triglyceride, Hydroxypropyltrimonium Hyaluronate, Triethanolamine, Biosaccharide Gum-2, Pistacia Lentiscus (Mastic) Gum, Propylene Glycol, Phenoxyethanol, Benzyl Alcohol, Methylparaben

You may also like

Recently viewed