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.

Before Pro Longer shampoo, apply to damp hair. Leave in 3 to 5 minutes. Rinse thoroughly. Shampoo as normal. Ask more information about this product

1202849 B - 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.CITRONELLOL.ALPHA-ISOMETHYL IONONE.TETRASODIUM EDTA. PARFUM / FRAGRANCE (F.I.L. C240996/2). 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 to your personal use.