Star Ingredients filler-a100 Penetrates The Fiber Core And Thickens , As Well As Immediately Conditions And Resurfaces Hair Fiber. Only L’oréal Professionnel Owns The Patented Filler-a100 Molecule. amino Acid Strengthens And Renews Lengths. key Ingredients aqua / Water / Eau , Aminopropyl Triethoxysilane , Lactic Acid , Peg-40 Hydrogenated Castor Oil , Hydroxyethylcellulose , Polyquaternium-6 , Phenoxyethanol , Citric Acid , Arginine , Panthenol , Linalool , Chlorhexidine Digluconate , Benzyl Alcohol , Parfum / Fragrance. C240988/1