I will give you the answer I give clients in the chair: done properly, with modern formulas, on suitable hair, no. But the qualifiers in that sentence matter, so let me unpack them.
Where the fear comes from
Early smoothing treatments released formaldehyde when heated. That earned the category a reputation it has struggled to shake, even though reputable salons abandoned those formulas years ago. Everything we use at Brazilian Bar is 100 percent formaldehyde free, built on glyoxylic acid chemistry that smooths by coating and sealing rather than by breaking the hair’s internal bonds.
That last part is the key difference. Relaxers and permanent straighteners restructure the hair and permanently weaken it. A Brazilian Blowout sits on and in the outer layer, then gradually wears away. Your hair underneath is unchanged.
Where damage actually happens
- Bad technique. The sealing step uses flat irons at high heat. In unskilled hands, especially on fine or bleached hair, that heat can scorch. This is a technician problem, not a treatment problem. Ask what temperature will be used on your hair; the answer should change based on your hair, not be one number for everyone.
- Wrong candidate. Hair that is severely over bleached, breaking, or chemically compromised needs repair first, not smoothing. I regularly redirect clients to a course of Intense Treatments (R150) or Deep Hair Repair before I will book them a blowout. A good stylist says no sometimes.
- Overlapping too often. Repeating the treatment every six weeks when it lasts twelve builds up product unnecessarily. Wait until the smoothness has genuinely faded.
The bottom line
On healthy or moderately damaged hair, applied by someone trained, a modern Brazilian Blowout is one of the gentler things you can do in a salon, far gentler than weekly heat styling to fight frizz. If you are unsure whether your hair is a good candidate, send us a photo. We will tell you straight, even if the answer is “not yet”. WhatsApp us on 068 190 4674.