6 Best Nail Hardener Without Formaldehyde 2023

How do you strengthen nails that crack and peel? The best nail hardener should not contain formaldehyde. Instead, it would be best to choose a natural or non-toxic nail strengthening agent.

Formaldehyde is a stench. Formaldehyde is all around us in building materials such as particleboard. It is a preservative and fungicide that can be used to embalm. It can cause respiratory problems and even leukemia, so it is important to limit your exposure. (1)

It is not permitted in top-quality nail polish brands. The majority of nail polish brands are at least three-free and avoid formaldehyde (dibutyl phthalate) or toluene.

As you read the reviews of nail hardeners below, you will see that these products do more than the minimum to protect your health. These are our top picks.

Best Nail hardeners that don’t contain formaldehydeSummary
Ella+mila First Aid Kiss, Nail Care, Nail Strengthener
Sally Hansen Treatment as Hard as Nails
Butter LONDON Horse Power Nail Repair Base Coat8-free and infused in horsetail extract, biotin and calcium are base coat that allows you to apply colored polish top.
Karma Organic Deep Nutrition Nails StrengthenerProduced by organic spa brands and free from formaldehyde and toluene. Infused with plant oils, extracts, and vitamins that strengthen nails and prevent fungal infections, you will notice a difference in days. Maximum benefits are achieved after three weeks. Doubles as a basecoat
OPI Nail EnhancerFormaldehyde-free is the Sensitive or Peeling Version of Nail EnvyExtra conditioning power is provided by adding vitamin E, calcium, and Kukui nut oilsAlthough a positive change should be evident within a week, the best results are seen after at least a month. Wearable on its own or as a base coat
3 Day GrowthTo prevent chipping and peeling, fortify the nails with KeratinA glossy, hard finish is attractive and can double as a base coat. After just three days, the nails have grown in length and strength. In addition, the formula contains no more than 20 harmful ingredients, including formaldehyde.
Hoof Nail Strengthening Creme

Top 7 Best Nail Hardener without Formaldehyde

1. Ella+mila Nail Care, Nail Strengthener – First Aid Kiss

2. Sally Hansen Treatment as Hard as Nails

Pros:

  • After a week of daily application, nails are noticeably stronger
  • Clear nail polish that looks like clear nail varnish. It can be used alone or as a base coat.
  • Easy to remove, chip-resistant
  • No formaldehyde or toluene.
  • Pro-vitamin B5 is included in this product, and green tea with antioxidants nourishes nails.

Cons:

  • Apply daily

3. Butter LONDON Horse Power Nail Rescue Base Coat

Pros:

  • 8-free and infused in horsetail extract, biotin, and calcium
  • It is a base coat that allows you to apply colored polish on top.

Cons:

  • May encourage continuous manicures, but the nails may need to be trimmed.

4. Karma Organic Deep Nutrition nails Strengthener

This natural nail hardener also protects against fungal infections. It not only strengthens nails but also improves overall health. It is hypoallergenic and free from formaldehyde DBP, toluene, and TPHP.

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To revive brittle nails, the formula uses extract from the resurrection plant, Selaginellalepidophylla. It also contains vegan ingredients such as avocado, apricot, and coconut. This is not surprising, considering that this organic spa brand is in PETA’s top ten.

Use it on clean, bare nails. There should be noticeable results within a week. The best results are achieved after three weeks. If desired, you can use it as a base coat underneath another polish.

The manufacturer also attempts to preserve the environment as much as possible. For example, they now print with soy-based ink and have stopped using plastic.

Pros:

  • Produced by organic spa brands and free from formaldehyde and toluene.
  • Infused with plant oils, extracts, and vitamins that strengthen nails and prevent fungal infections
  • You will notice a difference in a matter of days. Maximum benefits are achieved after three weeks.
  • Doubles as a basecoat

Cons:

  • It’s not completely indifferent

5. OPI Nail Envy Nail Enhancer, Sensitive, and Peeling

Does OPI nail strengthener contain formaldehyde? The original formula may contain formaldehyde, but the Sensitive or Peeling version doesn’t.

It contains calcium, vitamin E and Kukui nuts oil to condition nails. Apply two coats and then a second coat every other day to clean the nails. 

Remove Nail Envy at the end of each week and continue the process.

The nails will become strong and glossy over time. However, according to users, this can take one to two months. 

This can be worn as a base coat underneath other nail lacquers.

Pros:

  • Formaldehyde-free is the Sensitive or Peeling Version of Nail Envy
  • Extra conditioning power is provided by the addition of vitamin E, calcium, Kukui nut oils
  • Although a positive change should be evident within a week, the best results are seen after at least a month.
  • Wearable on its own or as a base coat
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Cons:

  • Multiple applications required

6. NAIL-AID Keratin 3 Day Growth

Is it possible to grow stronger, longer nails with this nail hardener in just three days? Nails naturally grow at about 3 and 1/2 millimeters per year. This product can’t stop that. In addition, it will prevent nails from peeling and chipping, so they look and feel stronger.

The nails will be glossy and hard from applying the 2nd coat. The hardener is keratin-based, which instantly strengthens weak nails. Apply a new coat every three days to protect your brittle nails. You can either use it on its own or as a base coat underneath colored lacquer.

It’s also free from 20 harmful ingredients such as formaldehyde and parabens.

Pros:

  • To prevent chipping and peeling, fortify the nails with Keratin
  • A glossy, hard finish is attractive by itself and can double as a base coat
  • After just three days, the nails have grown in length and strength.
  • The formula contains no more than 20 harmful ingredients, including formaldehyde.

Cons:

  • Applying a new coat three times a week will give you the best results
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