Force Nail Hardener
- Regular price
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15 € - Regular price
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- Sale price
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15 €
Force Nail Hardener
- Regular price
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15 € - Regular price
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- Sale price
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15 €
The care base to lastingly fortify and strengthen soft, thin nails.
The Fortifying Base is a strengthening polish enriched with AHAs, PHAs and silicon to strengthen nails from within and create a protective shield resistant to daily wear and tear.
After 1 week of use, nails are lastingly strengthened and visibly more resistant to breakage.
What is your nail type? Take our nail diagnostic by clicking here to find out!
Applicator:Brush tip
Nail types:Soft
Benefits:Hardens & protects
Use:As a 2-week treatment or before application
Free delivery from €39
Pay in 3 interest-free instalments (orders over €80)
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Nail Care Routine Pouch

- Regular price
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59 € - Regular price
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83 € - Sale price
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59 €
Base coat of your choicePreps nails
Description
This 85% bio-sourced nail care base, rich in AHA and PHA, stimulates cell renewal to promote a healthy and fast regrowth.
To be applied as a base before applying a Green colour or as a 1-week treatment for naturally stronger nails!
- Fortifies and strengthens
- Enriched with AHA and silicon
- Intense repair for soft nails
- Can be used as a base
- Recyclable glass bottle
How do I use the Strengthening Base?
For maintenance, apply alone or before your Green nail polish.
As a treatment, apply twice a week.
Ingredients / INCI
Super ingredients
INCI list
ETHYL ACETATE, BUTYL ACETATE, NITROCELLULOSE, ADIPIC ACID/NEOPENTYL GLYCOL/TRIMELLITIC ANHYDRIDE COPOLYMER, ACETYL TRIBUTYL CITRATE, ALCOHOL, GLYCOLIC ACID, AQUA (WATER), ETOCRYLENE, GLUCONOLACTONE, ISOPROPYL ALCOHOL, DIMETHYL OXOBENZO DIOXASILANE, CI 60725 (VIOLET 2)
84% plant-based
Pro tip ✨
Use as a standalone treatment, or as a regular base under Green nail polish — a true 2-in-1!
















Strengthens soft and brittle nails

Protects against
breakagePromotes healthy
and fast regrowth
Formula enriched with
AHA and silicon
FAQ
The most frequently asked questions from our users and community!
Why use a hardening nail polish?
Hardening nail polish is an essential treatment for fragile and brittle nails. It helps strengthen the nail structure, preventing splits and peeling. It is particularly recommended for people with soft or damaged nails, offering extra protection against external aggressors. Used regularly, it gives your nails the strength they need to withstand daily wear and tear, while improving their appearance.
When and how should you apply a nail hardener for best results?
For optimal results, apply the nail hardener to clean, dry nails. Ideally, use it as a base coat before applying a classic nail polish. You can also use it on its own as an intensive treatment. Apply a thin layer and let it dry before adding a second layer if needed. We recommend applying it 2 to 3 times a week to maximise its effectiveness. The hardener creates a protective barrier and promotes the regeneration of fragile nails.
How long does it take to see results from a nail hardener?
The initial results of a nail hardener polish are usually visible after 1 to 2 weeks of regular use. Your nails will gradually become stronger and more resilient. However, for long-lasting, visible results, we recommend using it alongside Green Oil and Keratin Booster, a hardening treatment that replenishes and strengthens the nail plate. This works to deeply reinforce your nails for optimal long-term results.
Can you apply regular nail polish over a nail hardener?
Yes, you can absolutely apply regular nail polish over a nail hardener. The hardener acts as a protective base, creating a solid, smooth layer on the nail, ideal for extending the wear of your polish. It's important to let the hardener dry before applying your coloured polish to achieve a clean, long-lasting finish.
Can treatment base coats be used as a base before applying my Green™ or Green Flash™ nail polish?
Treatment base coats can be used as the base for your Green™ manicure.
However, they cannot replace the Green Flash™ base coat, which cures under an LED lamp.
How many coats should you apply for a treatment base?
One coat is enough.
When reapplying a treatment base, do you need to remove the previous layer?
When doing a course of treatment, there is no need to remove the previous layer.
Is it recommended to use a treatment base coat under Green Flash™?
For optimal wear, it is not recommended to use a base coat other than Base Coat Green Flash™.
Can treatment bases be removed with the Green Flash™ remover?
All treatment bases are removed just like our nail polishes, with our Dissolving Oil or our Green Flash™ remover.
Which nail care is best suited to my nail type?
Every nail type is different! Feel free to take our online diagnostic to select the most suitable treatment;
We'll suggest a care routine that's just right for you!
What is the difference between the S.O.S Base and the Force Base?
The S.O.S Base is designed for brittle nails weakened by external aggressions: frequent gel manicures, excessive filing or buffing, overexposure to chemicals... The Force Base is designed for soft nails that tend to bend or fold easily.
To find out your nail type, take the personalised diagnosis: here
Can pregnant and/or breastfeeding women use the skincare range?
The skincare formulas are green and clean: they are bio-sourced up to 99%, meaning they are made from ingredients derived from biomass such as aloe vera, lemon, ginseng, pomegranate and grape. However, all nail polish, regardless of its nature, should be avoided by pregnant women or breastfeeding mothers. If in doubt, we invite you to consult your doctor.
Can using nail care products cause allergies?
Our care formulas are compliant with European regulations and do not contain sensitising substances. They are also certified gluten-free and safe for people who are gluten intolerant or have coeliac disease, just like the Green Flash™, Green™, and Active™ ranges. Most customers who have experienced allergies with conventional nail care products do not have any with the Manucurist care range. However, since allergic reactions are not exclusively linked to synthetic ingredients, they can sometimes occur with plant-based ingredients as well. If you have any doubts, we advise you to consult your doctor.
For more information, we recommend reading our blog post on allergies.
Our customers talk about us!
Reviews are collected 28 days after purchase and are from verified buyers only.
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Free delivery Free delivery to a pick-up point from €39 and to your door from €49. Valid in Metropolitan France.
Free delivery
Free delivery to a pick-up point from €39 and to your door from €49. Valid in Metropolitan France.
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3 interest-free instalments
Or pay by credit card, Paypal, Amazon Pay, Apple Pay, Bancontact, iDEAL, SOFORT, Giropay.
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Loyalty programme By becoming a Green Addict member, earn points and enjoy many exclusive perks!
Loyalty programme
By becoming a Green Addict member, earn points and enjoy many exclusive perks!
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Click & Collect Your order ready within 2 working hours in Paris, Tuesday to Saturday, 12pm–7pm.
Click & Collect
Your order ready within 2 working hours in Paris, Tuesday to Saturday, 12pm–7pm.
Are you a partner... or looking to become one?
Be part of the Green Revolution !
Access our full catalogue.
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✨ Book a free 15-min virtual consultation with one of our manicure experts!✨
✨ Book a free 15-min virtual consultation with one of our manicure experts!✨
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