Flex 435 Hair Mousse Styling Lab

For external use only. Avoid contact with eyes. Keep out of reach of children. DANGER: Extremely flammable aerosol. Pressurised container. May burst if heated. Keep away from heat, hot surfaces, sparks, open flames and other sources of ignition. No smoking. Do not spray onto an open flame or other source of ignition. Do not pierce or burn after use. Protect from sunlight. Do not expose to temperatures exceeding 50°C. Keep out of reach of children. Avoid direct inhalation. Do not spray into the eyes. Avoid prolonged spraying. Do not spray onto damaged or irritated skin. Use the product strictly for its intended purpose. If blocked, wash the nozzle with hot water.

Download the Styling Lab catalogue

Styling Lab is a professional finishing range designed for stylists who see styling as a creative tool that is constantly evolving.

Each product delivers precise performance on its own, allowing you to create defined, long-lasting and controlled finishes. At the same time, their formulas are designed to blend with one another, expanding creative possibilities and allowing each result to be tailored to the hair, the technique and the stylist’s vision.

Professional numbering system

The entire range features a three-digit numerical coding system, designed to facilitate the technical interpretation of the product.

Each value is expressed on a scale of 0 to 5, where 0 is the minimum level and 5 the maximum:

• 1st digit: Fixation
• 2nd digit: Treatment
• 3rd digit: Shine

This system allows you to immediately visualise the product’s performance and create strategic combinations with total precision.

DUAL PLEX Technology

Structural repair and visible results.

Hair damage affects both the internal structure and the surface of the hair. For this reason, the entire range incorporates DUAL PLEX Technology, a multi-layer repair strategy that acts from the core to the outside of the hair fibre.

Its action combines two complementary levels:

• Cortex Bond Plex™: acts on the cortex by reinforcing the internal structure, forming new bonds and reorganising the keratin matrix to improve the fibre’s strength, elasticity and cohesion.
• Cuticle Performance Plex™: optimises the hair surface, reduces porosity, improves cuticle sealing and enhances the shine and uniformity of the result.

The combination of both systems allows for a balance of hold, shine and care in every finish, guaranteeing visible results without compromising the quality of the hair fibre.

The same hairstyle can be completely transformed with a single adjustment: by changing the product, the combination or the proportion applied.

More control or more movement.
More definition or a natural finish.

Apply to clean, damp hair, distribute evenly using a comb, and then dry.

INGREDIENTS: Aqua (Water), Polyquaternium-4, Isobutane, Propane, Butane, Panthenol, Caprylyl Glycol, Glyoxyloyl Carbocysteine, Glyoxyloyl Keratin Amino Acids, Ceramide NP, Ceramide AP, Phytosphingosine, Pelvetia Canaliculata Extract, Hydrolyzed Silk, Propylene Glycol, PEG-40 Hydrogenated Castor Oil, Polysorbate 20, Glycerin, Propanediol, Sucrose, Hydroxypropylgluconamide, Hydroxypropylammonium Gluconate, Polysilicone-29, PPG-1-PEG-9 Lauryl Glycol Ether, Dipropylene Glycol, Glycolic Acid, Glyceryl Stearate, Xylitylglucoside, Anhydroxylitol, C9-11 Pareth-2, Urea, 2,3-Butanediol, Xanthan Gum, Sodium Lauroyl Lactylate, Sodium Lactate, Maltitol, Xylitol, Phenoxyethanol, Diallyldimethyl Ammonium Chloride, Tetrasodium EDTA, Malic Acid, Tartaric Acid, Benzyl Alcohol, Citric Acid, Sodium Citrate, Sodium Benzoate, Potassium Sorbate, Benzyl Salicylate, Hexyl Cinnamal, Hydroxycitronellal, Linalool, Linalyl Acetate, Trimethylbenzenepropanol, Parfum (Fragrance).

• Aqua (Water) ()

[Last updated: May 2026] See product packaging. The ingredients included in the composition of the products are regularly updated. Check the list of ingredients on the packaging of your product to ensure that they are suitable for your personal use.

• Aqua (Water) – water (solvent)
• Polyquaternium-4 – polyquaternium-4 (hair conditioner)
• Isobutane – isobutane (propellant)
• Propane – propane (propellant)
• Butane – butane (propellant)
• Panthenol – panthenol (humectant)
• Caprylyl Glycol – caprylyl glycol (humectant)
• Glyoxyloyl Carbocysteine – glyoxyloyl carbocysteine (hair repair agent)
• Glyoxyloyl Keratin Amino Acids – glyoxyloyl keratin amino acids (hair repair agent)
• Ceramide NP – ceramide NP (skin barrier repair agent)
• Ceramide AP – ceramide AP (skin barrier repair agent)
• Phytosphingosine – phytosphingosine (skin conditioner)
• Pelvetia Canaliculata Extract – Pelvetia canaliculata extract (skin conditioner)
• Hydrolyzed Silk – hydrolyzed silk (hair conditioner)
• Propylene Glycol – propylene glycol (humectant)
• PEG-40 Hydrogenated Castor Oil – PEG-40 hydrogenated castor oil (solubilizer)
• Polysorbate 20 – polysorbate 20 (solubilizer)
• Glycerin – glycerin (humectant)
• Propanediol – propanediol (humectant)
• Sucrose – sucrose (humectant)
• Hydroxypropylgluconamide – hydroxypropylgluconamide (skin conditioner)
• Hydroxypropylammonium Gluconate – hydroxypropylammonium gluconate (hair conditioner)
• Polysilicone-29 – polysilicone-29 (film former)
• PPG-1-PEG-9 Lauryl Glycol Ether – PPG-1-PEG-9 lauryl glycol ether (solubilizer)
• Dipropylene Glycol – dipropylene glycol (solvent)
• Glycolic Acid – glycolic acid (pH regulator)
• Glyceryl Stearate – glyceryl stearate (emulsifier)
• Xylitylglucoside – xylitylglucoside (humectant)
• Anhydroxylitol – anhydroxylitol (humectant)
• C9-11 Pareth-2 – C9-11 pareth-2 (surfactant)
• Urea – urea (humectant)
• 2,3-Butanediol – 2,3-butanediol (humectant)
• Xanthan Gum – xanthan gum (thickener)
• Sodium Lauroyl Lactylate – sodium lauroyl lactylate (emulsifier)
• Sodium Lactate – sodium lactate (humectant)
• Maltitol – maltitol (humectant)
• Xylitol – xylitol (humectant)
• Phenoxyethanol – phenoxyethanol (preservative)
• Diallyldimethyl Ammonium Chloride – diallyldimethyl ammonium chloride (hair conditioner)
• Tetrasodium EDTA – tetrasodium EDTA (chelating agent)
• Malic Acid – malic acid (pH regulator)
• Tartaric Acid – tartaric acid (pH regulator)
• Benzyl Alcohol – benzyl alcohol (preservative)
• Citric Acid – citric acid (pH regulator)
• Sodium Citrate – sodium citrate (pH regulator)
• Sodium Benzoate – sodium benzoate (preservative)
• Potassium Sorbate – potassium sorbate (preservative)
• Benzyl Salicylate – benzyl salicylate (fragrance)
• Hexyl Cinnamal – hexyl cinnamal (fragrance)
• Hydroxycitronellal – hydroxycitronellal (fragrance)
• Linalool – linalool (fragrance)
• Linalyl Acetate – linalyl acetate (fragrance)
• Trimethylbenzenepropanol – trimethylbenzenepropanol (fragrance)
• Parfum (Fragrance) – fragrance (fragrance)