If you spend every morning fighting frizz, the Brazilian blow dry — also called a keratin treatment — might be the most life-changing salon appointment you will ever book.
What Is a Brazilian Blow Dry?
A Brazilian blow dry is a semi-permanent smoothing treatment that infuses keratin protein into the hair shaft, then seals it with heat. The result is smoother, shinier, more manageable hair with dramatically reduced frizz. It does not straighten hair permanently — it relaxes the curl pattern and eliminates frizz while keeping some natural movement.
How Does It Work?
- Hair is washed with a clarifying shampoo to open the cuticle
- The keratin solution is applied section by section and left to penetrate for 20-40 minutes
- Hair is blow-dried thoroughly
- A flat iron is used at high heat to seal the keratin into the cuticle
- Hair is washed out and blow-dried smooth
The whole process takes 2-4 hours depending on hair length and thickness.
How Long Does It Last?
Results typically last 3-5 months. How long yours lasts depends on how often you wash your hair and the products you use — sulphate-free shampoo extends results significantly.
What Does It Cost?
Prices in the UK range from PS100-PS300 depending on salon and hair length. Short hair starts around PS100-PS150, while long, thick hair can reach PS250-PS300.
Aftercare Tips to Make It Last
- Wait 72 hours before washing your hair after the treatment
- Switch to sulphate-free and sodium chloride-free shampoo
- Avoid tucking hair behind ears or tying it up for the first 72 hours
- Use a silk or satin pillowcase
Find hair salons near you on Glowbooks to compare keratin treatment specialists.
Frequently Asked Questions
Is a Brazilian blow dry the same as a keratin treatment?
They are essentially the same thing — both terms are used interchangeably. Both use keratin protein sealed with heat.
Will it make my hair completely straight?
Not usually. Brazilian blow drys reduce curl and frizz but preserve some natural wave or movement, depending on your hair type.
Can I colour my hair before a keratin treatment?
Leave at least 2 weeks between colouring and a Brazilian blow dry. Many stylists recommend doing the keratin treatment first, then colouring 2 weeks later.