What Is a Brazilian Keratin Treatment?
Brazilian keratin treatment — also known as BKT or Brazilian Blowout — is a professional hair smoothing process that infuses keratin protein deep into the hair shaft, eliminating frizz, reducing curl, and leaving hair silky, shiny, and manageable for weeks or even months. Originally developed in Brazil, this treatment has become one of the most sought-after salon services worldwide.
Unlike traditional chemical relaxers that permanently break the hair's bonds, keratin treatments work by coating and sealing the hair cuticle with a keratin-rich formula, then locking it in with heat. The result is smoother, healthier-looking hair without the permanent structural change.
How Does It Work?
The science behind keratin treatments is straightforward: hair is naturally made of approximately 95% keratin protein. Heat, chemical processing, UV exposure, and everyday styling gradually deplete this protein, leaving hair porous, frizzy, and difficult to manage. A Brazilian keratin treatment replenishes this lost protein by:
- Opening the hair cuticle with a keratin-rich solution
- Infusing the formula deep into the cortex
- Sealing the cuticle shut with a flat iron at high heat (usually 230°C / 450°F)
The result is a smooth, sealed cuticle that reflects light evenly — giving hair that signature glossy finish.
Professional vs. At-Home Application
Keratin treatments are available in both professional-grade salon formulas and at-home kits. Here's what you need to know about each:
Professional Treatments
Salon-grade formulas are typically stronger, longer-lasting (3–6 months), and require professional application to ensure even coverage and safe heat use. They are ideal for clients with very frizzy, coarse, or chemically treated hair who want maximum smoothing results.
At-Home Kits
At-home keratin kits have improved dramatically in recent years. They offer a more accessible price point and can deliver excellent results when used correctly. They are best suited for those with mild to moderate frizz, or as a maintenance treatment between salon visits. Browse our full range of Brazilian Keratin Treatments to find the right option for your needs.
Step-by-Step Application Guide
- Wash hair with a clarifying or anti-residue shampoo to remove buildup and open the cuticle.
- Towel dry until damp — not soaking wet.
- Apply the keratin formula section by section, working from roots to ends. Ensure even saturation.
- Leave on for the time specified by your product (typically 20–45 minutes).
- Blow dry hair completely straight.
- Flat iron in small sections at the recommended temperature to seal the treatment.
- Wait 24–72 hours before washing or tying hair, depending on the product instructions.
How Long Does It Last?
Results vary depending on the formula strength, your hair type, and your aftercare routine. Generally:
- Professional treatments: 3–6 months
- At-home kits: 4–8 weeks
- Express or mini treatments: 2–4 weeks
Using sulfate-free shampoos and conditioners will significantly extend the life of your treatment.
Aftercare Tips to Maximize Results
- Use only sulfate-free, sodium chloride-free shampoos
- Avoid tying hair up or using clips for the first 72 hours
- Sleep on a silk or satin pillowcase to reduce friction
- Avoid swimming in chlorinated or salt water without protection
- Use a keratin-infused conditioner or mask weekly
Who Is It For?
Brazilian keratin treatments work on virtually all hair types — straight, wavy, curly, or coily — and are especially effective for:
- Frizzy or humidity-prone hair
- Chemically processed or color-treated hair
- Thick, coarse, or unmanageable hair
- Anyone looking to cut down daily styling time
Choosing the Right Product
Not all keratin treatments are created equal. Key factors to consider include formaldehyde content, processing time, heat requirements, and how long results last. If you're looking for a safer option, explore our Formaldehyde-Free Hair Straightening collection — a curated selection of effective, health-conscious formulas.
Whether you're a salon professional or treating your hair at home, the right Brazilian keratin treatment can transform your hair care routine. Explore our full Brazilian Keratin Treatments collection to find your perfect match.