Nail strengthener and hardener
S.O.S. Nail Strengthener

$15
$15

  • Repair
    A clear Manucurist S.O.S. Nail Strengthener bottle with a white cap sits on a light beige background, featuring a label in French and English stating "Repairs regenerates"—perfect for brittle nails needing repair.
  • A bottle of Manucurist S.O.S Rescue Duo sits on a pink background, with text highlighting user results: 100% harder nails, 97% healthier nails, and 93% improved nail quality for damaged nails after 21 days.
  • Close-up of S.O.S. Nail Strengthener by Manucurist being dispensed into an open bottle. Text reads: Regenerates very damaged nails, exfoliates, reinforces, and improves appearance—ideal for brittle nails.
  • A close-up shows Manucurist S.O.S. Nail Strengthener applied on a leaf-textured background. Text highlights key ingredients—AHA, Vitamin C, B5, and Hexanol—for repairing brittle nails and boosting nail strength.
  • Shown are three Manucurist base coats—including the S.O.S. Nail Strengthener—each labeled for specific nail needs, with descriptions and illustrations provided beneath each bottle for nail repair and brittle nails.
  • The Manucurist S.O.S Rescue Duo features two square glass bottles—Base S.O.S. with a white cap and Huile Verte with a dropper—ideal for restoring damaged nails after gel manicures.
  • The Manucurist S.O.S Rescue Duo, displayed in clear glass bottles on a beige background, offers two targeted nail treatments—Base S.O.S. and Masque S.O.S.—designed to restore and strengthen damaged nails.
1 5

Rescue and revive fragile, brittle, or severely damaged nails with the S.O.S. Nail Strengthener, a powerhouse treatment designed to repair, strengthen, and restore. Its highly concentrated formula, enriched with AHAs, vitamin C, vitamin B5, and hexanal, works like a protective shield, reinforcing the nail plate and revitalizing nails weakened by gel polish or external stressors.

By gently exfoliating, it stimulates cell renewal, strengthens keratin fibers, and enhances nail resilience, promoting visibly healthier, smoother, and stronger nails.

Clinically proven results: In just three weeks, nails appear stronger, harder, and deeply restored—ready to shine with renewed vitality.

What type of nails do you have? Complete our analysis by clicking here and find out!

A metal tuning fork with two prongs and a handle is shown on a light, textured background. Applicator: Brush
A simple black and white sketch of a hand in a fist, viewed from the side, with three lines above it to indicate motion or emphasis. Nail type: Damaged
A black checkmark inside a black circle on a light gray background. Benefits: Repairs and strengthens nails
A simple black outline of a magic wand with a star at the tip, surrounded by small lines indicating sparkles or magical effects, on a light gray background. Usage: At night, as a 2-week treatment

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Description

Powered by 78% plant-based ingredients, this vegan treatment is enriched with AHA, Vitamin C, Vitamin B5, and hexanal to hydrate, strengthen, and repair nails from the very first application. Perfect for use between gel manicures, it helps regenerate nails in just one week, restoring their natural resilience and vitality.

  • Repairs & strengthens
  • Multi-vitamin complex for optimal nail health
  • AHA-rich formula to promote renewal
  • Doubles as a protective base coat
  • Housed in a recyclable glass bottle – because beauty should be sustainable!

How to?

For maintenance, apply alone or before applying your Green nail polish. For a treatment cure, apply twice a week.

Pro tip ✨

Can be used as a stand-alone treatment or as a classic base coat under Green nail polish – a true 2-in-1!

Sustainable Packaging

Glass Bottle: Emptied, cleaned and dried bottles can either be reused or placed in a recycling bin seperate from other materials to avoid contamination. If your local manicapality does not accept glass for recycling, bottles can be brought to a collection center. No need to remove labeling.

Plastic Cap (Plastic-type #5 - Polypropylene): Clean and remove cap from brush attachment and place in recycling bin or bring to a local collection center.

Nail Brush (Plastic-type #4 - Low Density Polyethylene): Clean and remove cap from brush and place in recycling bin or bring to a local collection center.

Label: No need to remove label as glass recycling processes will remove any labelilng

Box (Kraft Paper Box): Paper box can be unfolded and added to paper recycling bin or brought to a local collection center, Kraft paper box can also be added to any compost bin.

As always, verify your local manicipalitiy's recycling regulations and procedures and for more information please go to berecycled.org/search or search.earth911.com

Ingredients (INCI)

Super ingredients

INCI list

ethyl acetate, butyl acetate, nitrocellulose, adipic acid/neopentyl glycol/trimellitic anhydride copolymer, acetyl tributyl citrate, alcohol, sucrose acetate isobutyrate, HEA IPDI isocyanurate trimer/polycaprolactone diol copolymer, glycolic acid, tris-HEA isocyanurate trimer, n-butyl alcohol, isopropyl alcohol, etocrylene, malic acid, lactic acid, hexanal, trimethylpentanediyl dibenzoate, aqua (water), panthenol, magnesium ascorbyl phosphate, CI 60725 (violet 2), tocopherol

78% plant-based
A clear Manucurist S.O.S. Nail Strengthener bottle with a white cap sits on a light beige background, featuring a label in French and English stating "Repairs regenerates"—perfect for brittle nails needing repair.
A bottle of Manucurist S.O.S Rescue Duo sits on a pink background, with text highlighting user results: 100% harder nails, 97% healthier nails, and 93% improved nail quality for damaged nails after 21 days.
Close-up of S.O.S. Nail Strengthener by Manucurist being dispensed into an open bottle. Text reads: Regenerates very damaged nails, exfoliates, reinforces, and improves appearance—ideal for brittle nails.
A close-up shows Manucurist S.O.S. Nail Strengthener applied on a leaf-textured background. Text highlights key ingredients—AHA, Vitamin C, B5, and Hexanol—for repairing brittle nails and boosting nail strength.
Shown are three Manucurist base coats—including the S.O.S. Nail Strengthener—each labeled for specific nail needs, with descriptions and illustrations provided beneath each bottle for nail repair and brittle nails.
The Manucurist S.O.S Rescue Duo features two square glass bottles—Base S.O.S. with a white cap and Huile Verte with a dropper—ideal for restoring damaged nails after gel manicures.
The Manucurist S.O.S Rescue Duo, displayed in clear glass bottles on a beige background, offers two targeted nail treatments—Base S.O.S. and Masque S.O.S.—designed to restore and strengthen damaged nails.

FAQs

Les questions les plus fréquemment posées par nos utilisatrices et notre communauté !

Can I use a treatment base coat as a base coat for my Green™ or Green Flash™ polish?

Treatment base coats can be used as a base coat as part of your Green manicure.

However, they cannot be used instead of a Green Flash™ base coat, which needs to dry under the lamp.

How many coats of treatment base coat do I need to apply?

A single coat is enough.

Can I use a treatment base coat under Green Flash™?

For maximum staying power, we recommend that you only use Green Flash™ Base Coat.

Can treatment base coats be removed with Green Flash™ Nail Polish Remover?

All our treatment base coats can be removed like our polish - with our Nail Polish Remover or Green Flash™ Nail Polish Remover.

If I want to apply more treatment base coat, should I remove the old coat first?

When using a treatment base coat, there's no need to remove the previous coat.

Can pregnant and/or breastfeeding women use your nail care range?

Our nail care formulas are green and clean: they are up to 99% plant-based, i.e. made from biomass ingredients like aloe vera, lemon, ginseng, pomegranate and grape. However, women should avoid all types of nail polish when they are pregnant or breastfeeding. We recommend you speak to a healthcare professional if you are unsure.

Can using your nail care products cause allergies?

Our nail care formulas meet European standards and do not contain any sensitising substances. They are also certified gluten-free and safe for people with gluten intolerance or celiac disease, as are our Green Flash™, Green™ and Active™ ranges. Most customers who are allergic to regular nail care products are not allergic to the Manucurist nail care range. However, as allergic reactions are not specifically linked to chemical ingredients, they can sometimes occur with plant-based ingredients. We recommend you speak to a healthcare professional if you are unsure.

For more information, see our blog on allergies.

Our customers talk about us!

Our reviews are collected 28 days after any purchase and these are the reviews of verified buyers only

Overall rating: 4.744681 / 5 from 141 reviews.

AI Generated Review Summary

The S.O.S. Nail Strengthener is praised for its ability to nourish, strengthen, and restore nails, providing a healthy and strong appearance. Customers appreciate its smooth application and long-lasting results, with many noting significant improvements in just three weeks.

Summary topics

  • Nail Nourishment (56%): Opinions vary, but nails are nourished, healthy, strong, and healthier with this basecoat.
  • Nail Appearance (9%): Customers loved how this product made their nails look healthy and strong, with a nice acrylic look.
  • Polish Application (5%): Customers keep praising the nail strengthening polish for its smooth application and long-lasting results. (100% agreement)
  • Product Effectiveness (7%): The feedback is varied, but the majority agree that this product makes a significant difference to nails.

Review topics: ["smell","look","base","nails","improvement","oil","consistency","polish","quality","gift","coat","strengthens","difference","manicure","shine","care","works","use","splitting","line","gel"].

Review highlights

  • "My nails looks now healthy and strong!" — Silvia S.
  • "My nails are looking healthy." — Marlene M.
  • "Great base that doesn’t hurt my nails." — Marlene J.

Reviews

Truly this helped save my

"Truly this helped save my nails along with cuticle oil application and masque sos after experiencing lifting and having to remove parts of my nails. This has helped keep my nails protected while they grow back, and i noticed that I have a natural apex to my nails again after a few months."

— Jessica S. (5/5)

Perfect!

"I used this throughout my natural nail recovery before switching to a builder gel overlay. It gave my nails protection while still allowing me to focus on strengthening them rather than hiding them under heavy enhancements. I appreciated that my nails actually looked neat and healthy while they were recovering. It became an important step in helping me transition back to my natural nails."

— Whitney (5/5)

If you need stronger nails. . .

"This is one of those products you didn't know you needed until you try it. It took me about 3-4 uses of Base S. O. S. and my nails are now visibly healthier and they feel significantly more strong/firm. I have been able to actually grow them out to a few millimeters with this miracle product. Base S. O. S. I use both as a base under the green polish and by itself, about twice every 10 days. I will continue to use as long as it exists!"

— Kathleen (5/5)

"I have used this for over a year and my natural Nails are in great shape."

— Jamie (5/5)

"I’m loving it! My nails are getting stronger"

— Brenda (5/5)

It’s good, tho sometimes it

"It’s good, tho sometimes it peels"

— Lore D. (4/5)

"Changed my nails!!"

— Leslie (5/5)

"The formula for the product had definitely changed some my last purchase. Its super thin, even with several coats. I don’t feel like it protects or helps my nails at all. I much preferred it when the product was much thicker."

— Mattie (1/5)

Nails are repaired finally

"I love everything about this product! My nails were super damaged after salon gel manicures, and Manucurist client support advised me to try their repairing coats before trying Green Flash. I'm so grateful, my nails have become stronger, thicker and smoother. I even can grow them out finally. I used Base S. O. S + active glow on top."

— Eugenia (5/5)

I really like to peel

"I really like to peel this off in the morning! My nails look healthy and hydrated when I do so."

— sljacobs5@aol.com ‎. (5/5)

Q&A