Liss Expert Professional Stem Cells Smoothing Treatment 2×250 ml — Keratin & Argan, Formaldehyde-Free

Liss Expert Professional Stem Cells Smoothing Treatment is a salon-grade keratin and argan oil system that smooths frizz, restores shine, and delivers up to 12 weeks of straightened, manageable hair when used as directed.

This two-bottle set (2 × 250 ml) combines plant-derived stem cells with an advanced keratin complex, collagen and argan oil to repair damaged strands, deeply hydrate, and reduce frizz for a healthy-looking finish. Designed for home use by people who want professional results, the formula is formaldehyde-free and targets rough cuticles, split ends and unruly texture while requiring a flat iron to seal the treatment for long-lasting performance.

How does the treatment improve hair texture and shine?

The formula deposits keratin and nourishing lipids into weakened areas of the hair shaft, smoothing the cuticle and reducing surface friction for a sleeker appearance. Argan oil and collagen boost moisture and light reflection, so hair looks glossier without feeling greasy.

• Keratin rebuilds and fills gaps in the hair fiber for smoother strands.
• Argan oil adds lightweight shine and hydration.
• Collagen improves manageability and elasticity.
• Plant stem cells support scalp and follicle nourishment as part of the care routine.

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

When applied precisely according to the included instructions and sealed with a titanium flat iron, users can expect visibly reduced frizz, softer texture, and straighter hair that lasts up to about 12 weeks. Longevity depends on hair porosity, styling frequency, and aftercare products you choose.

• Up to 12 weeks of smoother, more manageable hair under ideal conditions.
• Progressive improvement over a few washes as the product settles into the hair fiber.
• Heat sealing with a flat iron is required for maximum durability.
• Using sulfate-free shampoos preserves the treatment longer.

Is the at-home application complicated or time-consuming?

The system is built as a simple three-step routine: wash, apply treatment, and heat-seal. While the procedure requires attention to each stage and a professional-grade flat iron for best results, the step-by-step guide helps most people complete the process efficiently at home.

• Three steps: cleanse, apply the mask, then flat-iron small sections to seal.
• Recommended tools: titanium flat iron and a fine-tooth comb for even application.
• Typical session time varies with hair length and thickness; shoulder-length hair is faster to process.
• Following the instructions precisely ensures safer, longer-lasting outcomes.

Are there safety or ingredient considerations I should know about?

Liss Expert Professional is formulated without formaldehyde and avoids heavy waxy build-up, yet it still uses active protein and oil blends that require correct usage. Perform a patch test and follow ventilation and heat guidelines, especially during the flat-iron step.

• Formaldehyde-free keratin system for cleaner use.
• Patch test recommended before full application.
• Avoid overheating with the flat iron; use recommended temperature ranges.
• Use sulfate-free maintenance shampoos to extend the treatment life.

Who is this for? This smoothing treatment suits anyone seeking professional-level keratin results at home: people with frizz-prone, chemically treated, or heat-damaged hair who want improved manageability and shine without salon appointments. It’s especially helpful for those comfortable following a multi-step routine and using a flat iron to seal in long-lasting effects. If you prefer low-maintenance styling or need gentle day-to-day conditioning only, pair this treatment with a gentle maintenance regimen rather than frequent reapplications.