Serie Expert [Pro longer] Pro longer Mask

69% stronger hair fiber*. ​
Reduces hair breakage & split ends. ​
Gives long-lasting, shinier hair. ​

*Instrumental test: Shampoo + mask vs. non-conditioning shampoo. ​


For Longer, Thicker, Better Hair

Powered by a patented technology FILLER-A100 and Amino Acid, the Serie Expert Pro longer lengths renewing mask is the perfect treatment for long hair suffering from thinned ends. The fiber is instantly renewed, and the hair is stronger and shinier.

*Instrumental test Pro longer lengths renewing shampoo + lengths renewing mask
**Instrumental test: In-salon protocol Pro longer ends filler concentrate + lengths renewing shampoo + lengths renewing mask

Hair Type

Long hair with thinned ends


Reduces split ends by 66%. Hair becomes visibly fuller and thicker

*Instrumental Test: Concentrate + Shampoo + Mask



An exclusive combination of FILLER-A100 and Amino Acid to renew lengths and fill-in ends. The FILLER-A100, a patented technology owned by L'Oréal Professionnel only, penetrates the fiber core to thicken ends, and resurfaces. The Amino Acid brings strength to the fiber. For longer, thicker, better hair.