Liss Expert Professional Keratin Smoothing Treatment — 2×250ml (Shoulder-Length) Formaldehyde-Free with Argan Oil & Stem Cells

Liss Expert Professional Stem Cells Smoothing Treatment is a salon-grade, formaldehyde-free keratin system formulated with organic keratin, argan oil and plant stem cells to smooth frizz, restore shine and improve manageability for up to 12 weeks when sealed with a flat iron.

This two-pack (2 x 250 ml) provides an at-home professional straightening treatment designed for shoulder-length hair that combines advanced keratin repair with nourishing oils and stem-cell extracts. The formula targets damaged cuticles, reduces frizz and delivers long-lasting sleekness while avoiding harsh formaldehyde-based ingredients. It’s intended for users who want a salon-quality finish without repeated salon visits; proper application and heat sealing are required for best durability.

How does this treatment smooth and strengthen hair?

The formula fuses organic keratin with collagen and argan oil to reconstruct weakened strands and replenish surface lipids. Plant stem cell extracts add supportive nutrients that help improve the appearance of thinning or stressed hair without weighing it down.

• Organic keratin fills gaps in the hair cuticle to reduce breakage and frizz.
• Argan oil restores shine and softens hair for better combing and styling.
• Collagen provides surface support for smoother texture and less flyaway.
• Plant stem cells deliver botanical actives that support healthier-looking hair.

What results can I expect and how long will they last?

When applied according to the included three-step protocol and sealed with a titanium or ceramic flat iron, results can remain smooth and frizz-reduced for up to 12 weeks. Individual longevity varies with hair porosity, washing frequency and aftercare.

• Sleek, frizz-controlled hair for several weeks with proper sealing.
• Improved shine and manageability from the first application.
• Reduced styling time thanks to smoother, more cooperative strands.
• Maintain results with sulfate-free shampoos and minimal heat exposure.

Is the treatment safe and easy to use at home?

The formula is formaldehyde-free and designed for consumer application, but it requires careful adherence to the step-by-step instructions and correct heat sealing for safe, long-lasting results. Good ventilation and heat-protective tools are recommended during application.

• Three-step application simplifies salon-style results at home.
• Follow the guide closely and use a quality flat iron for sealing.
• Work in sections to ensure even coverage and consistent smoothing.
• Rinse and aftercare instructions are included to protect the treatment.

Which hair types benefit most from this product?

The treatment is formulated for all hair types—curly, wavy, frizzy, color-treated or chemically processed—and is especially useful for hair needing reconstruction, shine and better manageability. Results are tailored by hair thickness and previous chemical history.

• Curly and frizzy hair gains smoother, easier-to-style texture.
• Color-treated and chemically processed hair receive added repair and shine.
• Fine hair benefits from reduced flyaway without heavy buildup.
• Thicker or coarser hair may require stronger heat sealing for full effect.

Who is this for: This two-bottle kit suits people who want professional-level smoothing and repair at home—stylists, busy professionals, and anyone seeking fewer salon visits. It’s ideal for users ready to follow a structured application process and who have access to a quality flat iron. If you prefer gentle, long-lasting reduction of frizz with added shine and nutritional support from botanical stem cells and argan oil, this system offers a formaldehyde-free option for achieving smoother, more manageable hair.