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Si-Nails Nail Strengthener

Si-Nails Nail Strengthener

Excluding Sales Tax |

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.



    Daily care for damaged nails

    Si-Nails nail strengthener is a clear, lightweight serum delivered by an easy-to-use, one-click applicator pen, applied once a day. It can be applied to nails with colored nail polish. The first time you use Si-Nails, activate the brush by pressing down on the applicator until the brush is moistened (approximately 25 times). After first use, just click once for each nail you would like to apply it to. Visible results may be seen in 14 days, with best results achieved from ongoing application.

  • FAQS


    Can I use Si-Nails on top of nail polish or gel?

    Yes! Si-Nails can be applied on top of colored nail polish or gel.

    How long do I need to use Si-Nails for?

    Results can be seen from as little as 14 days. However, it depends on the condition of your nails before starting Si-Nails nail strengthening treatment. The condition of your nails will improve with extended use.

    The first time I used Si-Nails, I didn’t see any product come out. How do I start using it correctly?

    Before using Si-Nails for the first time, activate the click pen by pressing down on the click button at least 25 times, until the applicator is moistened. This will activate the flow and you will be able to start using Si-Nails correctly from then on. You only need to click 25 times at first application.


    Full ingredients list

    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

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