Discover our NEW Sleek & Stay heat-activated serum providing 10 days of sleek & shiny hair and semi-permanent results up to 5 washes. Powered by a patented technology [ALPHA-SILANE], it allows you to seal in the perfect Fructis Sleek

Unlock long-lasting, high-shine sleekness that stays with the Garnier Fructis Sleek & Stay Heat-Activated Serum, a breakthrough treatment designed to deliver semi-permanent results. Powered by our patented Alpha-Silane technology, this advanced serum provides a semi-permanent smoothing effect that lasts for up to 10 days and through 5 washes*. When activated by heat, the formula creates an invisible, ultra-resilient film that is 80% waterproof, sealing the hair fibre to block out humidity while providing high-performance thermal protection up to 230°C. The result is a mirror-like shine and a frizz-free finish that stands the test of time—inspired by Keratin Treatments. The Power of the 4-Step Keratin Sleek System. This serum is the definitive final step in our comprehensive smoothing regimen. For the most optimal results, follow the full system: [N°1] Shampoo: Gently cleanses the scalp and prepares the hair cuticle for treatment. [N°2] Conditioner: Expertly detangles and softens while infusing the fibre with keratin. [N°3] Mask: An intensive deep-treatment that smooths the hair structure and controls stubborn frizz. [N°4] Heat-Activated Serum: Featuring patented Alpha-Silane technology, this final step provides a waterproof, thermal shield for 10 days of sleek hair that lasts up to 5 washes*. Garnier commits to greener beauty: Vegan Formula, Cruelty-Free International approved, made in a factory that has reached 100% Renewable Energy. *Instrumental test

Patented Alpha-Silane Technology: A revolutionary heat-activated complex that provides a semi-permanent sleek effect for 10 days of manageable, frizz-free hair*.

Heat-Activated Protection: Creates a waterproof film (up to 80%) and heat protection (up to 230°C) for ultimate frizz control during styling

Mirror-Like High Shine: Clinically proven to transform dull hair into a radiant, glossy finish that reflects light for a healthy-looking glow.

Complete System Step 4: Final step in the 4-step Keratin Sleek System, delivering professional salon-quality smoothing results at home

Officially Approved Cruelty-Free: Proudly approved by Cruelty Free International, reflecting Garnier’s commitment to a world without animal testing since 1989.

Ingredients

1285631 – INGREDIENTS: DIMETHICONE, BIS-(MORPHOLINOMETHYL C1-4 DIALKOXYSILOXY) DIMETHICONE, BIS-CETEARYL AMODIMETHICONE, PARFUM / FRAGRANCE. (F.I.L. Z70054674/1)Please be aware that ingredient lists for the products of our brand are updated regularly. Please refer to the ingredient list on your product package for the most up-to-date list of ingredients to ensure it is suitable for your personal use.