Liss Expert Professional Keratin Smoothing Treatment 250 ml (Shoulder) — Argan Oil & Stem Cells, Formaldehyde-Free

Liss Expert Stem Cells Smoothing Treatment is a professional-grade, formaldehyde-free keratin system with argan oil and plant stem cells that smooths, repairs and delivers salon-style straightness for up to 12 weeks when sealed with heat.

This 250 ml (8.45 oz) salon formula is designed to restore softness, reduce frizz and improve manageability for all hair types. The blend pairs hydrolyzed keratin, nourishing argan oil and collagen with plant-derived stem cells to hydrate and fortify strands while preserving natural movement. The treatment is intended for at-home or professional use; following the step-by-step instructions and using a titanium flat iron for sealing are necessary to maximize longevity and performance.

How does this treatment rebuild and smooth damaged hair?

The formula supplies keratin proteins and collagen to temporarily fill gaps in the hair shaft, while argan oil and hydrating actives lock in moisture and add shine. Plant stem cells contribute nutrients that support scalp and follicle vitality without heavy residue. Together these ingredients reduce tangles, minimize breakage and create a sleeker surface for light reflection and slip.

• Hydrolyzed keratin to reinforce weakened fiber
• Argan oil for glossy, conditioned strand surfaces
• Collagen and humectants to retain moisture and elasticity
• Plant stem cells for supporting scalp and follicle environment

Will the results last through washing and styling?

When applied correctly and sealed with a high-temperature flat iron, the smoothing effect can last up to 12 weeks, depending on hair porosity and aftercare. Use sulfate-free shampoos and limit frequent clarifying treatments to extend the life of the smoothing layer. Touch-up or follow-up treatments can be scheduled as results gradually relax with washing and new hair growth.

• Sealing with titanium flat iron is essential for durability
• Opt for sulfate-free maintenance shampoos to preserve the treatment
• Avoid excessive washing and strong clarifying products
• Results vary by hair type, porosity, and styling frequency

How simple is the application for at-home use?

The system is packaged for a straightforward three-step application: cleanse, apply treatment, and seal with heat. Clear instructions are included; attention to timing, sectioning and ironing temperature is important to achieve uniform results. For first-time users or highly textured hair, a professional application can ensure optimal distribution and sealing.

• Three-step process: wash, apply evenly, and flat-iron to seal
• 250 ml size designed for shoulder-length hair coverage
• Follow the included timing and temperature guidelines precisely
• Professional application recommended for complex textures

Is this formula safe and appropriate for colored or chemically treated hair?

The treatment is formaldehyde-free and formulated to be gentle on processed hair while providing smoothing and repair benefits. Always perform a strand test before full application to confirm compatibility with prior chemical services. If you have recently colored hair or chemical relaxers, consult a stylist for sequencing and timing recommendations.

• Formaldehyde-free keratin system
• Suitable for many colored and chemically treated hair types with a strand test
• May improve manageability and reduce breakage on processed hair
• Consult a professional for complex chemical histories

Who is this for: Liss Expert Stem Cells Smoothing Treatment is ideal for anyone seeking long-lasting frizz control, improved shine and salon-grade straightening from home or in a professional setting. It suits shoulder-length to longer hair (250 ml recommended for shoulder length), people with frizz-prone or damaged hair who want a smoother, more manageable finish, and users who are willing to follow precise application steps and heat-sealing to achieve the best, long-lasting result.

Ingredients

Collagen