Hardener
A nail hardener enriched with pistacia lentiscus resin for stronger, more beautiful nails in only 21 days.Hardener for more beautiful...
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Description
Description
A nail hardener enriched with pistacia lentiscus resin for stronger, more beautiful nails in only 21 days.
Hardener for more beautiful and resistant nails
The SEPHORA COLLECTION nail hardener takes care of soft and breakable nails. It leaves stronger and more beautiful nails with each application. For a treatment, apply a coat on bare nails on the first day and a second coat the following day. The next day, remove and reapply a coat, etc., for 21 days. Once the treatment is complete, your nails will be 40% harder (1), smoother and have 35% fewer ridges. They will also be less breakable and splitting is reduced by 29% (1).
The hardener can also be used as a manicure base to prolong the nail polish’s hold.
The hardener is available in a transparent or pink version to instantly enhance the nails. The added bonus: its ergonomic brush makes it easy to apply by delivering the perfect amount in one swipe.
A hardener enriched with ingredients from natural origin
This hardener polish is enhanced with pistacia lentiscus resin. It makes the nails more resistant and less breakable. Day after day, they split less and are visibly more attractive.
The added bonus?
- Vegan hardening polish (free from animal-derived ingredients).
- 81% of ingredients from natural origin.
(1) Measured scientifically on 22 volunteers after 21 days’ use.
Ingredients
Ingredients
CLEAR HARDENER - INGREDIENTS : ETHYL ACETATE, BUTYL ACETATE, NITROCELLULOSE, ADIPIC ACID/NEOPENTYL GLYCOL/TRIMELLITIC ANHYDRIDE COPOLYMER, ALCOHOL, TRIETHYL CITRATE, STEARALKONIUM BENTONITE, DIACETONE ALCOHOL, CAPRYLIC/CAPRIC TRIGLYCERIDE, CI 77891 (TITANIUM DIOXIDE), PISTACIA LENTISCUS (MASTIC) GUM, TOCOPHEROL, TOCOPHERYL ACETATE, PHOSPHORIC ACID, ASCORBIC ACID, ALUMINUM HYDROXIDE, TRIETHOXYCAPRYLYLSILANE, PENTAERYTHRITYL TETRAISOSTEARATE, CI 19140 (YELLOW 5 LAKE), CI 77491 (IRON OXIDES).
PINK HARDENER - INGREDIENTS : ETHYL ACETATE, BUTYL ACETATE, NITROCELLULOSE, ADIPIC ACID/NEOPENTYL GLYCOL/TRIMELLITIC ANHYDRIDE COPOLYMER, ALCOHOL, TRIETHYL CITRATE, STEARALKONIUM BENTONITE, DIACETONE ALCOHOL, CAPRYLIC/CAPRIC TRIGLYCERIDE, CI 77891 (TITANIUM DIOXIDE), PISTACIA LENTISCUS (MASTIC) GUM, TOCOPHEROL, TOCOPHERYL ACETATE, PHOSPHORIC ACID, ASCORBIC ACID, ALUMINUM HYDROXIDE, TRIETHOXYCAPRYLYLSILANE, PENTAERYTHRITYL TETRAISOSTEARATE, BARIUM SULFATE, CI 15850 (RED 6), CI 19140 (YELLOW 5 LAKE).
Tips
Tips
What’s the best way to use the SEPHORA COLLECTION nail hardener?
For optimal results, the hardening nail polish should be used as a 21-day treatment. Apply a coat of hardener on bare nails on the first day and a second coat the following day. On the third day, remove the 2 coats with nail polish remover then reapply a first coat. Repeat this treatment for 21 days.
The hardener can be worn alone or as a base under colored nail polish.
Yes to strengthened nails and more supple cuticles
For a flawless manicure, use the SEPHORA COLLECTION cuticle care. It is enriched with sweet almond oil to soften the skin around the nail.
FAQ
What is nail hardener for?
It’s a hardener treatment for fragile, broken or split nails. It fortifies soft nails or nails damaged by repeated manicures and gel manicures. Applied as a treatment, it helps make the nails more attractive, stronger and more resistant.
Should I apply a nail hardener before or after the polish?
A hardening polish must be in direct contact with the nail surface. So it’s always applied on bare nails.
Which nail hardener should I choose?
The transparent hardener is very discreet. It strengthens the nails without adding color or shine. The pink hardener adds a natural, rosy nuance. Its milky pink shade is ideal for a French manicure effect.
Hardener
Take the time you deserve, and let beauty shine within you
Leaving skin plump, smooth, and radiant.
100%
Users reported a noticeable boost in skin moisture after using the serum,
with hydration levels significantly improving.
94%
Users observed visible improvement in blemishes, redness, and uneven skin
tone, revealing a clearer, more balanced complexion.
After 2 months
Clients Love Us
Jenny W.
“This was a great way for me to try Osea products for the first time and I highly recommend all of them. They work well and I will be repurchasing.”
Jenny W.
“This was a great way for me to try Osea products for the first time and I highly recommend all of them. They work well and I will be repurchasing.”
Jenny W.
“This was a great way for me to try Osea products for the first time and I highly recommend all of them. They work well and I will be repurchasing.”
Jenny W.
“This was a great way for me to try Osea products for the first time and I highly recommend all of them. They work well and I will be repurchasing.”
Jenny W.
“This was a great way for me to try Osea products for the first time and I highly recommend all of them. They work well and I will be repurchasing.”

Cultivating Change with Every Bottle
The good design concepts at the heart of Danish design are functionality, beauty and the needs of the many. This is a strong tradition. And when a tradition is strong enough, it leaves room for innovation that allows us to always move forward.
Vegan, Cruelty-Free
We have always used vegan and
cruelty-free ingredients.
Gluten Free
We continuously use vegan and
cruelty-free formulas
Paraben Free
We’ve always selected vegan and
cruelty-free ingredients.
Packaging
We have consistently made vegan and
cruelty-free choices.
Discover more in our FAQ
How long does it take to process an order?
How long does it take to process an order?
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Do you ship internationally?
Do you ship internationally?
Yes, we offer international shipping to select countries. Please check our shipping policy for details on destinations, rates, and delivery times.
What is your return policy?
What is your return policy?
We accept returns within 30 days of delivery, provided the items are unused and in their original condition. For detailed instructions, please refer to our return policy or contact our support team.
What are your sizing options?
What are your sizing options?
Our products are available in a range of sizes to ensure the perfect fit. Detailed sizing information is provided on each product page, and our size guide can help you choose the best option.
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