Protein Single Pass, Formaldehyde FREE, Straightening Treatment 300ml

Name: Protein Single Pass, Formaldehyde FREE, Straightening Treatment 300ml
Brand: Le Prö Cosmetics
Price: 340.00 QAR
Availability: InStock

QAR 340,00 QAR 425,00

Our Protein Single Pass is a treatment mask that has a simplified application that optimizes the professional’s time and reaches 100% straight results in any hair texture.

• Helps align and smooth the hair strands
• Reduces frizz and improves manageability
• Enhances softness and shine
• Supports the restructuring of the hair fibre
• Simplified one-step professional application
• Formaldehyde-free formula
• Suitable for chemically treated hair, subject to a strand test
• Approximately 10–12 applications, depending on hair length and volume

Quinoa Protein – Helps condition and strengthen the hair fibre.

Hydrolyzed Keratin – Supports the structure, resilience and smooth appearance of damaged hair.

Wheat Protein – Helps improve softness, body and manageability.

Macadamia Oil – Nourishes the hair and enhances softness and shine.

Suitable for different hair textures requiring smoothing, alignment and frizz control, including chemically treated hair. Use on blonde or sensitized hair only after evaluating its condition and completing a strand test.

• Size: 1L
• Professional salon use
• Formaldehyde-free
• Creamy consistency
• Mild scent
• Simplified one-step application
• Approximate yield: 10–12 complete applications

ADVANCED TECHNOLOGY

Protein Single Pass combines advanced hair-alignment technology with an innovative, formaldehyde-free formula. Its one-step professional application eliminates the need for anti-residue shampoo, helping optimize salon time while delivering smoother, shinier and more manageable hair.

The formula is enriched with quinoa protein, hydrolyzed keratin, wheat protein and macadamia oil. These conditioning actives help nourish the hair fibre, maintain moisture and elasticity, reduce frizz and support a naturally aligned finish.

HOW TO USE

Professional use only. Always wear suitable gloves and perform a strand test before applying the product.

Wash the hair thoroughly with Hidrate Repair Shampoo.
Massage the scalp gently, distribute the foam through the lengths and ends, and rinse thoroughly.
Place approximately 85 ml of product in a suitable bowl. Adjust the quantity according to the hair’s length and volume.
Beginning at the nape, divide the hair into thin sections and apply evenly with a professional brush, maintaining a distance of approximately 1 cm from the scalp.
Distribute the product through the lengths and ends using a fine-tooth comb.
Allow it to process for 40–60 minutes, depending on the hair’s thickness, porosity and strand-test result. Do not exceed 60 minutes.
Rinse thoroughly with water until the product is completely removed.
Blow-dry the hair completely.
Working in thin sections, finish with a professional flat iron. Do not exceed 180°C and adjust the temperature according to the hair’s condition and strand-test result.

IMPORTANT: A strand test is mandatory before every application. Discontinue use immediately if irritation or an undesirable change in the hair occurs.

SEE THE RESULTS

Drag the slider to compare the before and after results

BEFORE

AFTER

WATCH THE STEP-BY-STEP TUTORIAL

Discover the collection

Frequently asked questions

pH 2.0

Around 150 to 180 days. After this period, it’s necessary to do a root retouch. However, durability will change according to how much your hair will grow and how you take care of it at home.

It’s imperative to use a good shampoo, conditioner and mask. Choose products that are free of salt, like our Hydrate Repair or Nutri Force lines, that are developed for post-straightening hair.

Yes, they can use it normally, just remember to wash away all the product before flat ironing the hair. Rinse it only with water, don’t use shampoo. It’s important to pay attention to the flat iron’s temperature so there’s no change in the hair color.

We always recommend asking for your doctor’s guidance and preferably show them the label of this product.

For coloring, we recommend a break of 15 days between procedures. We advise waiting around 15 to 30 days to perform a bleaching procedure. In this meantime, it’s important that the hair is being treated to gain force and health. Before the application, it’s imperative to perform a strand test.

No, we recommend the application of this product in teenagers over 14 years old.

No, our product was developed with the ideal amount of acid so this or hair fall won’t happen. However, it’s important to keep a distance 0.5cm from the scalp when applying this product and make sure that your scalp is healthy to avoid any unwanted reactions, which can be done through the strand test.