Last updated November 2026
If you spend Auckland’s humid summer months fighting frizz with a straightener, you have probably seen Nanoplasty mentioned. It has become a regular on New Zealand salon menus, and searches for it here have grown over the past year as people look for alternatives to traditional keratin treatments. Here is what it is, how it compares, what it will and will not do, and the questions worth asking before you book one in Pukekohe.
★View the Best Hairdressers in Pukekohe→What is Nanoplasty?
Nanoplasty is a salon smoothing treatment. A conditioning formula, usually built around amino acids, proteins and plant extracts, is applied to the hair and then sealed in with a blow-dry and a flat iron. The idea is that very small particles work into the hair shaft rather than simply coating the outside, which smooths the cuticle, reduces frizz and relaxes curl or wave.
Results vary with the brand and with your hair. On frizzy or wavy hair it can give a sleek, straighter finish. On tighter curls it is more likely to soften and loosen the pattern than make it poker straight.
Nanoplasty vs keratin: the main differences
Both treatments smooth hair and cut down on styling time, so they are easy to confuse. The differences are mostly in the ingredients and the aftercare.
Main ingredients
- Nanoplasty
- Amino acids, proteins and plant-based actives; usually marketed as formaldehyde-free
- Traditional keratin smoothing
- Keratin protein, with many older formulas relying on formaldehyde or ingredients that release it when heated
Main effect
- Nanoplasty
- Smooths and straightens, and can noticeably reduce curl
- Traditional keratin smoothing
- Mainly softens curl and controls frizz
Aftercare
- Nanoplasty
- Many brands allow washing and tying hair straight away
- Traditional keratin smoothing
- Some formulas ask you to avoid washing or tying hair for a few days
How long it lasts
- Nanoplasty
- Brands commonly quote up to around six months
- Traditional keratin smoothing
- Commonly a few months, depending on the product
Treat the table as a guide rather than a rule. Products differ widely, and a newer keratin formula can be closer to a Nanoplasty than to the keratin treatments of ten years ago.
What about “hair botox”?
Hair botox is a deep-conditioning treatment that fills in rough, damaged areas of the hair to add shine and reduce frizz. It does not straighten. If your main goal is softer, glossier hair rather than a straighter shape, it may be all you need, and it is worth asking about at a consultation.
The formaldehyde question
Much of the interest in Nanoplasty comes from concern about formaldehyde, which some older smoothing products contained or released when heated with a flat iron. Overseas workplace regulators have measured it in salon air during those treatments. In New Zealand, cosmetic ingredients are controlled through the EPA’s rules for cosmetic products.
“Formaldehyde-free” on a label is a good start, but it is reasonable to ask your stylist which product they use and whether it contains formaldehyde-releasing ingredients such as methylene glycol. A salon that uses a treatment confidently will be happy to show you the product.
Who Nanoplasty suits, and who should wait
Good candidates
- Frizzy, puffy or hard-to-manage hair that takes a long time to blow-dry
- Wavy hair you would like to wear straight with less effort
- Coloured hair that has become rough and needs smoothing
- Anyone who wants to cut down on daily heat styling
Worth talking through first
- Very fragile or freshly bleached hair, where your stylist may suggest a strand test or a treatment first
- Curls you love and want to keep, because Nanoplasty will loosen them
- Plans to colour soon, since many stylists prefer to colour before smoothing rather than straight after
Questions to ask before you book
- Which product do you use, and can I see the ingredient list?
- How straight is my hair likely to be, given my texture?
- How long will the appointment take?
- Can I wash, tie or swim straight afterwards?
- Which shampoo and conditioner should I use to help it last?
- Should I colour before or after the treatment?
On cost, salons usually price Nanoplasty by hair length and thickness because longer, denser hair takes more product and time. Ask for a quote at your consultation rather than relying on a figure you have seen online.
Making it last
Sulphate-free shampoo and a light conditioner help a smoothing treatment last longer, as does washing a little less often. Chlorine and salt water both shorten its life, so rinse well after a swim at the pool or a day at Karioitahi Beach. Heat styling is still fine, but most people find they need far less of it.
Where HarringtonWest fits
HarringtonWest on West Street offers Biopulent Nanoplasty, a plant-based treatment sourced from South America that the salon describes as completely free of formaldehyde and harsh fumes. Its Nanoplasty page answers common questions, including how it differs from keratin, and notes results lasting up to six months with no downtime after the appointment. The salon also offers an express Nanoplasty and QiQi smoothing, and you can book a smoothing appointment online or ask the team which option suits your hair.
