Formaldehyde-free keratin treatment: guide

GuideFormaldehyde-freeKeratin treatment

A formaldehyde-free keratin treatment is one whose ingredient list names no formaldehyde, no formaldehyde releaser and no glyoxylic acid. All three have to be absent, because a releaser and glyoxylic acid can give off the same thing as formaldehyde itself under the heat of the flat iron. That is also the check you can do yourself: read the INCI and look for the three groups of names below. On our shelves two chemistries meet that strict definition: plant tannin, as in Salvatore Tanino Therapy and Blue Gold, and cysteamine, as in the Brazil Protein line: Bio Lamination, Nano Gel and Bioplastia Vegan. A treatment on glyoxylic acid is a formaldehyde alternative, but falls outside this definition.

Short answer: Formaldehyde-free means: no formaldehyde, no releaser, no glyoxylic acid, all three. You check it yourself on the INCI with the three name lists below. Expect smoother, more manageable hair that you maintain with aftercare and that washes out over months, not a permanent reshaping.

Free of

Formaldehyde, releasers, glyoxylic acid

Check it yourself

On the INCI

Tannin

Salvatore

Cysteamine

Brazil Protein

What does 'formaldehyde-free' mean exactly?

The word covers more than one substance. A list is only really formaldehyde-free when three things are missing. Formaldehyde itself is the first. A formaldehyde releaser is the second: an ingredient that slowly gives off formaldehyde even though the word 'formaldehyde' appears nowhere on the list. Glyoxylic acid is the third: an acid that can react in a comparable way under the heat of a flat iron. A list that leaves out all three is what you are looking for. 'Formaldehyde-free' on the front of a box says nothing by itself; the INCI on the back says everything.

Why salons choose it on purpose

Formaldehyde and its releasers can give off fumes during blow-drying or ironing. Many salons therefore choose a formaldehyde-free list deliberately: for the air in the salon, for the stylist who stands in it every day, and for clients who would rather avoid it. For hair that is already sensitive or bleached it counts twice, because porous hair asks for the mildest list. It is a preference you can verify on the label, not something you have to take on the packaging's word.

How to check it yourself on the INCI

The ingredient list is on the pack and, with us, on the product photo. Go through these three groups; if you see one of these names, the list is not formaldehyde-free.

Formaldehyde itself: formaldehyde, methylene glycol, formalin, paraform.
Releasers: DMDM hydantoin, imidazolidinyl urea, diazolidinyl urea, quaternium-15.
Glyoxylic acid and family: glyoxylic acid, glyoxyloyl carbocysteine, glyoxyloyl keratin amino acids.

If none of these is on the list, the treatment meets the definition. This is the check you can do with any brand, not only with ours, and it takes two minutes.

What to realistically expect

A formaldehyde-free treatment makes the hair smoother, less frizzy and more manageable. It works differently from a treatment on formaldehyde: the tannin acts on the salt and hydrogen bonds of the keratin and is set with the flat iron, cysteamine relaxes the bonds in the fibre, and in both cases the result washes out over months instead of staying until the hair is cut. For a tannin smoothing we count on three to five months, depending on the aftercare. For most salon clients that is exactly the point: a more natural, groomed result without the sharp air.

Formaldehyde-free does not mean without disadvantages. Time in the chair, a season-long commitment with a line at the regrowth, and an iron that dries the hair out when it is handled badly, whatever chemistry is in the bottle. The honest list is on our page about the disadvantages and risks of a tannin smoothing.

Which treatments are formaldehyde-free

Two chemistries meet the strict definition: tannin and cysteamine. This is what they look like on our shelves, and how you read them on the INCI.

TANNIN

Salvatore Tanino Therapy (Step A + Step B) and Blue Gold (Step 1 + Step 2) smooth with plant tannin, set with the flat iron. None of the 30 ingredient lists Salvatore publishes names formaldehyde, a releaser or glyoxylic acid. The Blue Gold Premium kit 2x1000 ml adds a blue pigment in Step 2 against warm tones; the A+B kit 2x1000 ml is the open system with the letter steps around it. How the treatment works is in our taninoplastia explained guide; which of the two systems fits your chair, in the Tanino Therapy vs Blue Gold comparison.

CYSTEAMINE

Brazil Protein builds three smoothing systems on the same amino-acid reducer, cysteamine and cysteine, and none of the three names formaldehyde, a releaser or glyoxylic acid. Bio Lamination 1000 ml is the cream, activated by malic acid, for coarse and resistant hair. Nano Gel 1000 ml is the gel with aloe vera, applied to unwashed hair and left to process for at least 40 minutes in one go. Bioplastia Vegan 1000 ml is the anti-yellow cream: 10 to 50 minutes of processing, sealed at 204 °C, with Acid Violet 43 against warm and yellow tones and no animal ingredient on the list. The same reducer sits in the BTOX Extreme Shine, the gloss-led variant; the three systems come together as the salon smoothing trio.

OUTSIDE THE DEFINITION

Treatments on glyoxylic acid, often sold as Nanoplastia, are marketed as a formaldehyde alternative but fall outside the strict definition: glyoxylic acid is the third name you do not want to see. The full brand-by-brand comparison is in our guide to the keratin treatment for blonde hair.

Which aftercare goes with it?

The treated length wants a list at home that is as clean as the treatment itself. After a Salvatore smoothing that is the Chemical Repair duo, shampoo and mask at every wash, and for blonde or bleached hair the violet Blond Hair duo against yellow tones. The whole Tanino Therapy home-care line shares the same free list, so the aftercare matches the treatment. Which set follows which salon service is in our home care chooser; what you do and do not do in the first thirty days, in the Tanino Therapy aftercare guide.

Brazil Protein pairs each cysteamine system with its own home-care duo. After Bioplastia Vegan that is the violet-toning Blond Vegan duo, shampoo and conditioner that keep the tone cool; treatment and duo are sold together as the Bioplastia Vegan salon and home care kit. After Bio Lamination it is the Bio Lamination duo, shampoo and conditioner mask on babassu and coconut, also as a salon and home care kit. After Nano Gel the Nutrition Power detox duo is the home routine, also as the Nano Gel kit. The full line is under Brazil Protein home care.

In short

Formaldehyde-free means: no formaldehyde, no releaser, no glyoxylic acid.
Check it yourself on the INCI with the three name lists above; the front of the box does not count.
Expect smoother, manageable hair that you maintain with aftercare and that washes out over months.
Formaldehyde-free on our shelves: Salvatore Tanino Therapy and Blue Gold (tannin), Brazil Protein Bio Lamination, Nano Gel and Bioplastia Vegan (cysteamine), each with its own home-care duo; glyoxylic acid systems fall outside.

Frequently asked questions

What does formaldehyde-free mean exactly?

That the ingredient list names no formaldehyde, no formaldehyde releaser and no glyoxylic acid. All three count, because a releaser or glyoxylic acid can give off the same thing as formaldehyde itself under the heat of the flat iron. You check it on the INCI on the pack, not on the front of the box.

How do you see whether a product contains formaldehyde?

Read the INCI and look for three groups: formaldehyde itself (also methylene glycol, formalin, paraform), the releasers (DMDM hydantoin, imidazolidinyl urea, diazolidinyl urea, quaternium-15) and glyoxylic acid and its family (glyoxylic acid, glyoxyloyl carbocysteine, glyoxyloyl keratin amino acids). If none of these names is on the list, the treatment is formaldehyde-free.

Does a formaldehyde-free treatment work as well?

It works differently. A tannin or cysteamine treatment makes the hair smoother and keeps frizz under control, and the result washes out over months instead of staying until the hair is cut. Anyone expecting a permanently straight result will be disappointed; anyone who wants a groomed, more natural result without the sharp air gets exactly that.

Which treatments are formaldehyde-free?

On our shelves, two routes. Salvatore Tanino Therapy and Blue Gold work on plant tannin: none of the 30 ingredient lists Salvatore publishes names formaldehyde, a releaser or glyoxylic acid. Brazil Protein Bio Lamination, Nano Gel and Bioplastia Vegan work on cysteamine and cysteine and name none of the three either; each has its own home-care duo. Treatments on glyoxylic acid are a formaldehyde alternative but fall outside the strict definition.

Is formaldehyde-free better for bleached hair?

Porous, bleached hair asks for the mildest list, so a formaldehyde-free treatment is a good fit. Watch the temperature and the colour as well: Salvatore prints 180 to 200 °C for blonde hair on Blue Gold Premium and puts a blue pigment in Step 2 against yellow tones. What else matters is in our guide to Blue Gold Premium on blonde hair.

Does a formaldehyde-free treatment have disadvantages?

Yes, other ones than the fumes. Time in the chair, a season-long commitment with a line at the regrowth, and a flat iron that dries the hair out when it is handled badly, formaldehyde or not. The full list, from dry hair to pregnancy, is on our page about the disadvantages and risks of a tannin smoothing.

All Salvatore systems, kits and the daily line are on the Salvatore Cosmetics brand page.