L'Oréal Série Expert Absolut Repair Molecular Leave-In Mask 100ml

L'Oréal Série Expert Absolut Repair Molecular Leave-In Mask 100ml is a salon-developed leave-in treatment for damaged hair, built around L'Oréal Professionnel's patented 2% Peptide Bonder paired with five amino acids. The lightweight, no-rinse formula targets damage at the molecular level — helping to rebuild hair structure, smooth the cuticle and protect against heat styling, with results designed to deliver the equivalent of two years of repair in a single application.

About L'Oréal Professionnel

L'Oréal Professionnel is the salon-distribution arm of L'Oréal, founded in 1909 by chemist Eugène Schueller as the original L'Oréal Hair Colourant. The Série Expert line is the brand's flagship in-salon haircare system, organised by hair concern: Absolut Repair (damage), Vitamino Color (colour-treated), Inforcer (weakened) and others. The Molecular range within Absolut Repair is the line's most advanced bond-rebuilding treatment.

Key ingredients

• Peptide Bonder (2%): A patented peptide ingredient that targets damage at the molecular level, helping to rebuild the hair's internal structure.
• 5 Amino Acids (Arginine, Glycine, Serine, Tyrosine, Glutamic Acid): Building blocks of the hair's keratin structure, supporting strength and resilience.
• Conditioning Silicones (Dimethicone, Amodimethicone): Coat the hair shaft to leave a silky, smooth finish and add slip.
• Behentrimonium Chloride: A conditioning agent that helps the formula glide through tangles.

Key benefits

• Rebuilds the look and feel of damaged hair from within.
• Smooths the hair cuticle for a soft, polished finish.
• Provides heat protection up to 230°C (450°F) when used before styling.
• Leave-in formula — no rinsing required.
• Suitable for all damaged hair types and textures.

Who it's for

Designed for anyone with damaged, brittle, fragile or chemically processed hair — bleached blondes, colour-treated clients, relaxed or chemically straightened hair, or hair that feels weakened by heat styling. Suitable for all hair types and textures.

How to use

1. Shampoo and condition as usual, then towel-dry the hair until just damp.
2. Dispense the recommended amount based on hair length (start with 2 pumps; add as needed).
3. Apply through the lengths and ends, focusing on the most damaged areas. Avoid the roots.
4. Comb through with a wide-tooth comb to distribute evenly.
5. Do not rinse. Style as usual — the mask also acts as a heat protectant for blow-drying or heat tool use.

Specifications

• Size: 100ml
• Format: Leave-in molecular repair mask
• Hair type: All damaged hair types and textures
• Brand: L'Oréal Professionnel (Série Expert)
• Made in: Spain / France