How to Do a Brazilian Keratin Treatment in 7 Safe Steps

By Isabella Costa, Content Writer · Technically reviewed by Nathalia Lima (Chemistry Technician, CRQ IV) · Published November 05, 2026

Key Takeaways

• A Brazilian keratin treatment is best performed by a licensed hair professional following the specific product label and Safety Data Sheet.
• The seven-stage framework includes cleansing, assessment, sectioning, controlled application, product-specific processing, blow-drying, and flat-ironing.
• Temperature, processing time, product quantity, rinsing, and flat-iron passes vary by formula and must not be copied from a generic tutorial.
• Some smoothing products can contain or release formaldehyde when heated, including products marketed as formaldehyde-free, according to OSHA.
• Aftercare should follow the selected system's directions, particularly for washing, swimming, styling, and maintenance products.

A Brazilian keratin treatment should be performed by a licensed hair professional who follows the exact product label and Safety Data Sheet. The usual framework is cleanse, assess and section, apply, process, rinse if directed, blow-dry, and flat-iron as instructed; timing, temperature, product amount, and iron passes must never be generalized.

What supplies do you need, and how do you choose a suitable professional keratin treatment kit?

A professional Brazilian keratin treatment requires more than a smoothing formula and a flat iron. The service should be planned around the client's hair history, the manufacturer's complete protocol, workplace controls, and the documentation supplied with the product.

A Brazilian keratin treatment is a cosmetic, salon-associated smoothing procedure in which a formulated product is applied and typically sealed through blow-drying and flat-ironing. It is not a medical keratin therapy, and it should not be confused with a permanent chemical hair relaxer, which changes the hair through a different chemical process.

Professional supply checklist

• The selected professional smoothing formula in its original, labeled container
• A clarifying shampoo, if required by that formula's preparation protocol
• Gloves and any additional personal protective equipment specified by the label or Safety Data Sheet
• Nonmetallic bowl and application brush, when directed by the manufacturer
• Sectioning clips, combs, towels, and a cape
• A blow-dryer with controlled airflow
• A temperature-adjustable flat iron
• A timer and a clean, organized workstation
• Access to appropriate general and local exhaust ventilation
• The product label, application manual, and Safety Data Sheet

A Safety Data Sheet provides hazard, handling, exposure-control, first-aid, storage, and protective-equipment information for a professional product. OSHA advises salons to review both labels and Safety Data Sheets and to implement appropriate ventilation and worker protections when hair-smoothing products may expose workers to formaldehyde. See the official OSHA hair salon guidance and the OSHA formaldehyde standard.

How to evaluate a professional keratin kit

Review documentation for names such as formaldehyde, formalin, or methylene glycol. Methylene glycol is a formaldehyde-related ingredient name that may appear in hair-smoothing documentation. The U.S. Food and Drug Administration explains that some hair-smoothing products contain formaldehyde or release it when heated. OSHA has also reported that certain products labeled formaldehyde-free have still exposed salon workers to formaldehyde, so a front-label claim should not replace document review.

For stylists comparing a professional hair kit, Make Beauty offers options such as Grace Unique, Grace Violet, Pure Protein, and Brigitte Keratin. Grace Unique is presented by Make Beauty as a formaldehyde-free professional option, while Grace Violet is intended for professionals selecting a system for blonde or gray hair. Before using either one, consult its current label and official protocol rather than transferring instructions from another treatment.

How is a Brazilian keratin treatment applied step by step?

A Brazilian keratin treatment is applied through a controlled salon sequence, but every operational number must come from the selected product's instructions. The following seven steps explain the framework without inventing a universal temperature, waiting period, application quantity, or number of passes.

Step 1: Conduct a consultation and hair assessment

Ask about color, bleaching, relaxers, previous smoothing services, scalp sensitivity, allergies, breakage, and recent chemical processing. Examine elasticity, porosity, density, scalp condition, and fragile areas. The stylist should determine whether to proceed, modify the service according to the approved protocol, or postpone it.

Read the label and Safety Data Sheet before opening the product. If the instructions call for a strand test or sensitivity test, complete it exactly as directed. Do not apply a smoothing product to irritated or injured skin unless its official directions expressly support the service and a qualified professional determines it is appropriate.

Step 2: Cleanse as directed

Wash with the specified preparatory cleanser. A clarifying shampoo may be used when required by the manufacturer's protocol to remove buildup and prepare the hair, but it is not automatically appropriate for every system. Follow the formula's directions for shampoo quantity, repetitions, rinsing, and whether conditioner should be omitted.

Step 3: Dry, detangle, and section the hair

Bring the hair to the moisture level required by the instructions. Some systems may call for fully dried hair, while others may specify a different preparation. Detangle gently and divide the hair into clean, manageable sections so the formula can be distributed consistently.

Protect the client and workstation with the equipment identified by the label and Safety Data Sheet. Ventilation should already be operating before application, particularly when the product documentation identifies airborne hazards.

Step 4: Apply the treatment in controlled sections

Beginning where directed by the protocol, apply thin, even amounts to small sections. Avoid oversaturation and unintended contact with the scalp, eyes, face, or skin. Comb or distribute the formula only as instructed and remove excess if the manual requires it.

The correct quantity depends on factors such as hair length, density, porosity, and the specific formula. Stylists should not copy an amount seen in a step-by-step keratin treatment video because that model's hair and product may be different.

Step 5: Process and rinse only if instructed

Allow the formula to process for the period stated by the manufacturer. Do not extend the waiting period on the assumption that more time will create a straighter result. Whether the hair is rinsed, partially rinsed, or left unrinsed before drying also varies by system.

This is one reason the steps of a keratin treatment at a salon can differ between brands. The professional should keep the correct manual at the workstation rather than relying on memory from another product.

Step 6: Blow-dry using the prescribed technique

Blow-dry according to the formula's directions, controlling airflow and tension while maintaining the required ventilation. The FDA notes that heating certain hair-smoothing products can release formaldehyde into the air. Eye, nose, throat, skin, or respiratory irritation during the service should never be treated as an expected sign that the product is working.

Step 7: Heat-seal with the flat iron according to the protocol

The flat iron is the heat-styling tool commonly used to seal an applied smoothing formulation. Select temperature and passes from the product's current instructions and adjust only within the permitted protocol based on the assessment of the hair.

Bleached, highlighted, gray, porous, fragile, and previously processed hair may require a different professional decision from resistant, untreated hair. Never assume the highest temperature or the greatest number of passes is best. Complete the service, finish the hair, and provide the client with written aftercare instructions specific to the system used.

How should you care for your hair afterward, and what should you do if irritation occurs?

Aftercare begins with the product-specific instructions given by the stylist. Waiting periods before washing and limitations involving clips, ponytails, exercise, swimming, or styling vary by formula; there is no universal rule for the entire Brazilian keratin category.

Washing and daily maintenance

• Wash only when the selected treatment's instructions permit it.
• Use a compatible maintenance cleanser, such as a sulfate-free option, when recommended by the treatment manufacturer.
• Apply conditioner through the lengths and detangle gently to reduce mechanical stress.
• Use heat protection and avoid unnecessary repeated high-heat styling.
• Follow the stylist's instructions before scheduling color, bleaching, or another chemical service.

Make Beauty maintenance options include Liz shampoo and Marilyn shampoo. Select maintenance products according to the treatment protocol and the hair's needs rather than assuming every sulfate-free shampoo is interchangeable.

Pure Protein (formerly Pure Caviar) may be considered when a professional is selecting a nourishing treatment approach, while Feelings Ampoules can be incorporated into an appropriate care plan. They should not be assumed to replace the prescribed aftercare for a specific smoothing system.

How to protect keratin-treated hair while swimming

First check whether the manufacturer requires a waiting period before pool or ocean exposure. Once swimming is permitted, wetting the hair with clean water before entering, using a protective leave-in compatible with the treatment, and rinsing promptly afterward may help limit prolonged contact with pool or seawater. Wear a swim cap when practical and cleanse according to the stylist's maintenance plan.

What to do if irritation or an allergic-type reaction occurs

Stop the service and move away from the exposure. Follow the first-aid directions on the label and Safety Data Sheet, and seek medical guidance for eye, skin, breathing, or persistent symptoms. Severe breathing difficulty, swelling, faintness, or rapidly worsening symptoms require emergency medical assistance.

The FDA reports that formaldehyde exposure from smoothing products may produce eye, nose, throat, skin, and respiratory symptoms. Salon workers should also follow workplace incident and medical-evaluation procedures applicable to their location. Consumers and professionals in the United States can report cosmetic adverse events through the FDA's reporting channels.

Can the effects be reversed?

There is no universal instant reversal method because the response depends on the formula, hair condition, and completed process. Do not stack a relaxer, bleach, or another smoothing treatment over the hair in an attempt to reverse the result. Contact the original stylist or manufacturer, disclose exactly what was used, and obtain a professional assessment before further chemical processing. Washing should begin only when the treatment directions allow it.

At-home keratin treatment vs. a professional salon service

The FDA discourages consumers from applying hair-smoothing products themselves at home and recommends using a licensed hair professional. A trained provider can assess the hair, review the Safety Data Sheet, control application, select settings within the approved protocol, and operate in a properly arranged workspace.

Searching for how to do a Brazilian keratin treatment step by step on YouTube can be useful for understanding broad salon workflow, but a video is not a substitute for formal training, a product-specific manual, or a Safety Data Sheet. A digital hair course certificate supplied with a salon product kit may support education, but stylists must still meet local licensing requirements and complete any manufacturer-specific training.

Likewise, searching for how to do a keratin treatment at home naturally can create confusion. Household masks and oils may condition or temporarily reduce a frizzy appearance, but they do not reproduce a professional heat-sealed salon procedure. Consumers wanting an at-home care option should browse products specifically intended for home use in the home-care kit collection, rather than using a professional-only formula without supervision.

Brazilian keratin treatment, hair botox, and relaxers: what is the difference?

A hair botox treatment is a marketing term generally used for a separate conditioning or smoothing category. It should not automatically be treated as equivalent to a Brazilian keratin treatment, and it does not involve injectable botulinum toxin. The actual formula and directions determine how a product is applied.

For professionals researching hair botox treatment products, Carmen Btox is Make Beauty's relevant smoothing option. Its instructions should be followed independently; do not transfer the seven-step keratin framework to Carmen Btox unless its official protocol directs the same action.

Readers comparing product categories can also review Brazilian Keratin vs. GK Keratin. That comparison covers treatment selection, while this guide focuses specifically on professional application workflow.

Frequently Asked Questions

How do you apply a Brazilian keratin treatment safely?

Use a licensed professional who reads the product label and Safety Data Sheet, assesses the hair, follows the exact application protocol, and uses the required ventilation and protective equipment. Never generalize temperature, processing time, or flat-iron passes.

How do you maintain hair botox?

Follow the hair botox product's own aftercare instructions. Use compatible shampoo and conditioner, minimize unnecessary high heat, and ask the stylist when swimming, coloring, or another treatment is permitted.

How do you use a botox hair mask?

Apply it only according to its label because cleansing, application area, processing time, rinsing, and heat requirements vary. A hair botox mask is not automatically used like a Brazilian keratin formula.

What should you do after permanent straightening to keep hair straight?

Use the maintenance products recommended for the specific chemical service, limit avoidable moisture and heat damage, and schedule professional follow-up. Permanent relaxers and keratin treatments are different categories, so their aftercare should not be combined without guidance.

Can you wash your hair immediately after a keratin treatment?

Only if the manufacturer permits it. Some formulas may allow earlier washing while others specify a waiting period, so the stylist should provide the exact direction for the product used.

Recommended Make Beauty Products

The right professional product depends on hair condition, color history, desired cosmetic result, and the official protocol. The following guide helps narrow the category without replacing a stylist's assessment.

If your main goal is a professionally performed keratin straightening service, consider Brigitte Keratin as the product to discuss with your stylist. The professional should confirm that it suits your hair and then follow its current instructions for preparation, application, heat sealing, and aftercare.

Explore professional straightening products, maintenance care, and salon kits at MakeBeautyInternational.com. Choose products based on their official directions and obtain professional support before performing any heat-sealed smoothing treatment.

Key Points

1. A Brazilian keratin treatment should be performed by a licensed hair professional who follows the selected formula's label, Safety Data Sheet, and application manual.
2. The seven-step framework covers consultation, cleansing, sectioning, application, processing, blow-drying, and flat-ironing, but all operational details vary by product.
3. Formaldehyde, formalin, and methylene glycol should be checked in product documentation because some smoothing formulas may contain or release formaldehyde when heated.
4. Aftercare rules for washing, styling, swimming, coloring, and maintenance products must come from the manufacturer rather than a universal online schedule.
5. Brigitte Keratin is a professional option to explore with a trained stylist through MakeBeautyInternational.com when planning a keratin straightening service.