L'Oréal Professionnel's Pro Longer concentrate treatment thickens long hair for visibly healthier and stronger looking lengths. ​When used with the Pro Longer shampoo and ends-filler treatment for long hair, split ends are reduced visibly by 66%.*​The unique Filler A-100 technology works by penetrating the fiber core to plump and thicken the hair from the inside. Amino acids in the formula work to strengthen the hair from the outside. The formula works on thin ends, or areas where help is most needed.​

*Instrumental test, after application of Shampoo + mask + concentrate

• Renews lengths and fills in ends
• Enhances shine
• Minimizes breakage and split ends
• Thickens long hair
• Hair is visibly healthier and stronger looking 

How To Use 

Before Pro Longer shampoo, apply to damp hair. Leave in 3 to 5 minutes. Rinse thoroughly. Shampoo as normal. 

Ingredients 

Aqua / water / eau, aminopropyl triethoxysilane, lactic acid, peg-40 hydrogenated castor oil, polyquaternium-6, phenoxyethanol, citric acid, arginine, panthenol, benzyl salicylate, benzyl alcohol, chlorhexidine digluconate, linalool, limonene, hydroxycitronellal, citronello, alpha-isomethyl ionone, tetrasodium EDTA, parfum / fragrance (f.i.l. c240996/2). Please note that ingredient lists for our brand's products are regularly updated. To ensure it is suitable for your personal use, kindly refer to the ingredient list on your product package for the most up-to-date information.