Isdin Si-Nails Nail Strengthener 2.5ml – Nail Strengthening and Cuticle Hydration Treatment
Isdin Si-Nails is an innovative nail-strengthening treatment designed to improve the strength, hydration and overall appearance of fragile, brittle nails. Its colourless, fast-absorbing formula helps reinforce the nail structure, improve flexibility and nourish the cuticles, promoting healthier-looking nails.
Combining cationic hyaluronic acid, organic silicon and Pistacia lentiscus extract, SI-NAILS helps improve nail hydration, support keratin production and promote nail remineralisation. Biosaccharide Gum-2 also helps form a protective film against external aggressors.
Easy to apply and with an invisible finish, it can also be used on polished nails according to the manufacturer’s information. With daily use, visible improvements may appear from 14 days.
Key Benefits of Isdin Si-Nails
- Helps strengthen fragile nails: Supports nail structure and helps improve resistance and hardness.
- Improves nail hydration: Cationic hyaluronic acid helps maintain moisture and nail flexibility.
- Supports keratin production: Pistacia lentiscus extract helps stimulate the synthesis of hard keratins, contributing to stronger-looking nails.
- Helps remineralise nails: Organic silicon supports the mineral content of the nail matrix.
- Hydrates and improves cuticles: Helps maintain softer, smoother and healthier-looking cuticles.
- Protective action: Biosaccharide Gum-2 helps create a film that protects nails against external aggressors.
- Invisible finish: Colourless formula that leaves no visible coating.
- Fast and convenient application: Easy-to-use brush applicator for daily nail care.
- Visible results from 14 days: Improvements may become noticeable with consistent daily use.
Key Ingredients
- Cationic Hyaluronic Acid (Hydroxypropyltrimonium Hyaluronate): A modified form of hyaluronic acid with moisturising properties. It helps retain hydration, improve nail flexibility and maintain the healthy appearance of nails and cuticles.
- Pistacia Lentiscus Gum (Mastic Gum): A botanical ingredient derived from the resin of the mastic tree. It helps stimulate the synthesis of hard keratins and supports the structure and hardness of the nails.
- Organic Silicon (Silanediol Salicylate): Helps increase the silicon content of the nail and supports remineralisation of the nail matrix, contributing to stronger, healthier-looking nail growth.
- Biosaccharide Gum-2: A film-forming ingredient that helps protect the nail surface against external environmental aggressors.
- Caprylic/Capric Triglyceride: An emollient that helps condition the nail area and improve the feel of the formula.
Clinical Results
Visible improvements from 14 days
ISDIN reports that daily use of SI-NAILS helps strengthen and remineralise fragile nails, with visible results from 14 days. The before-and-after images supplied by the manufacturer correspond to 28 days of use.
Results after 4 weeks
In a manufacturer-reported evaluation involving 30 women aged 18–65 with fragile nails, participants reported the following results after 28 days of regular application:
- 97% reported stronger and more hydrated nails.
- 97% reported faster nail growth.
- 93% reported more beautiful-looking nails.
- 87% reported an improvement in the appearance of their cuticles.
Source: ISDIN, evaluation of the efficacy, safety and compatibility of SI-NAILS following 28 days of use under normal conditions in 30 women aged 18–65 with fragile nails. Manufacturer data on file, 2018. These results reflect the findings of this specific evaluation and do not guarantee identical outcomes for every user.
How to Use Isdin Si-Nails
Apply once daily to clean, dry nails and cuticles. For best results, use it regularly, preferably at night.
First use:
- Press the applicator button approximately 25 times until the brush becomes moist with product.
- Once the product starts dispensing, only one press per nail is needed for subsequent applications.
Daily application:
- Ensure nails are clean and dry, preferably without nail polish.
- Brush the product along the entire nail edge and cuticle.
- Use vertical brush strokes from the base towards the tip, covering the whole nail surface.
- Apply a little product underneath the free edge of each nail.
Important application advice: Avoid contact with water for up to six hours after application to allow the product to remain on the nails. If you wash your hands during this period, reapply as necessary.
Who Is It Suitable For?
Isdin Si-Nails is particularly suitable for:
- People with fragile, weak or brittle nails.
- Nails that break or split easily.
- Nails that need additional hydration and conditioning.
- Dry or poorly conditioned cuticles.
- Those looking to improve nail strength, flexibility and overall appearance.
- Anyone wanting a colourless, easy-to-use daily nail treatment.
Important Precautions
- For topical use only.
- Do not swallow.
- Do not apply to wounds or damaged skin.
- Keep out of reach of children.
- Store below 30°C.
- Do not refrigerate or freeze.
- For optimal product preservation, store the container vertically with the brush applicator facing upwards.
- Follow the instructions provided on the packaging.
Why Choose Isdin Si-Nails?
Isdin Si-Nails combines innovative nail-care ingredients to help strengthen fragile nails, improve hydration and condition cuticles. Its formula supports keratin production and nail remineralisation while helping protect against external aggressors. With a convenient brush applicator, invisible finish and visible improvements reported from 14 days, it is an excellent addition to a daily nail-care routine.
Need help choosing the right nail-care products for fragile, brittle or damaged-looking nails? Send us your questions through the product page’s Q&A section at Lyskin Love Your Skin. Our team will be happy to help you find the most suitable products for your needs.
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