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
- Shampoo and condition as usual, then towel-dry the hair until just damp.
- Dispense the recommended amount based on hair length (start with 2 pumps; add as needed).
- Apply through the lengths and ends, focusing on the most damaged areas. Avoid the roots.
- Comb through with a wide-tooth comb to distribute evenly.
- 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
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