SI-NAILS® Nail Strengthener
SI-NAILS® Nail Strengthener is backordered and will ship as soon as it is back in stock.
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INCI
INCI
Key ingredients
Key ingredients
Mode of employment
Mode of employment
Results
Results
Characteristics
Characteristics
Benefits
Benefits
FAQS
FAQS

SI-NAILS® Nail Strengthener
ISDIN Si‑Nails® It is a clinically formulated nail strengthener designed to improve the health, strength, and appearance of nails and cuticles. Its advanced formula combines:
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Cationic hyaluronic acid, which penetrates deeply and provides long-lasting hydration, increasing nail flexibility and reducing the risk of breakage.
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Mastic oil (Pistacia lentiscus), botanical resin that stimulates the synthesis of hard keratins, strengthening the structure and thickness of the nails.
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Organic silicon (silanediol salicylate), which remineralizes the nail matrix and promotes strengthened natural growth.
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Biosaccharide Gum‑2, which forms a protective film that defends against external aggressions.
A clinical study in 30 women with fragile nails showed visible improvements in just 14 dayswith 97% reporting harder and more hydrated nails and accelerated growth, and 87% better cuticles after one month of daily use.
The product, presented in format click-pen (2.5 ml), offers precise application without filing: it activates with 25–30 clicks, and then just one click per nail is enough, preferably applied once a day at night. It is recommended to avoid contact with water during 6 hours post-application to optimize absorption.










