L'Oréal Professionnel Paris Keratin Alpha Sleek Hair Mask - 200ml, Deep Nourish & Long‑Lasting Frizz Control

L'Oréal Professionnel Keratin Alpha Sleek Professional Hair Mask is an intensive salon-grade treatment that deeply nourishes, smooths and controls frizz for visibly softer, shinier hair.

This rich, sensorial mask uses a Keratin-Alpha Shaper complex and amino-acid chains to rebuild and reshape the hair fiber, delivering instant softness, hydration and a polished finish. Designed to work across hair types, it quickly tames volume and flyaways while leaving strands luminous. When combined with the Keratin Alpha Sleek Smooth Transformer according to the routine, you can extend smoothness for up to two weeks; applied alone it still provides immediate smoothing, manageability and shine.

How will this mask change unruly, frizzy hair?

The formula targets the hair surface and internal fiber to reduce frizz and bulk, making styling simpler and results more predictable. Its conditioning agents smooth the cuticle and improve slip so combing and blow-drying require less force, reducing breakage. Visible control is noticeable from the first application, with progressively stronger anti-frizz benefits when used in the recommended routine.

• 84% less frizz reported in formula testing for smoother appearance
• 76% reduction in hair volume for a sleeker silhouette
• Rich texture softens and hydrates immediately on application
• Alcohol-free and free from artificial colorants for gentler care

What results can I expect after one use and with continued use?

After a single treatment hair feels noticeably softer, more hydrated and reflects light better for added shine. Continued use improves manageability and maintains a sleeker look between washes; when alternated with the Smooth Transformer weekly, the brand reports up to two weeks of extended smoothness. Regular application helps preserve the reshaped keratin structure and keeps frizz at bay.

• Instant softness and shine from first application
• Progressive improvement in smoothness with repeated use
• Enhanced manageability reduces styling time
• Routine option available for extended anti-frizz protection

How do I use the Keratin Alpha Sleek Hair Mask for best results?

Apply on clean, towel-dried hair, concentrating on mid-lengths to ends, leave in according to packaging instructions, then rinse thoroughly. For salon-level control, use the mask on alternate wash days and the Keratin Alpha Sleek Smooth Transformer once a week to lock in longer-lasting smoothness. Pair with heat protection when blow-drying or styling to protect the treated surface and extend results.

• Use after shampoo on damp hair; comb through for even distribution
• Leave for the recommended time to allow deep nourishment
• Rinse well and style as usual; follow routine for extended effect
• Suitable with heat protectors and complementary L'Oréal salon products

Is this mask safe for color-treated or chemically processed hair?

The alcohol-free, dye-free formula is formulated to be gentle on most hair types, including color-treated and chemically processed hair. Its focus is on rebuilding and smoothing the keratin structure rather than altering color, so it integrates well into salon care regimens. Always follow any aftercare advice from your stylist for chemically treated hair.

• Alcohol-free and without artificial colorants for milder treatment
• Works on all hair types, including colored and treated hair
• Complements professional salon services and maintenance routines
• Consult your stylist if hair has recent chemical services

Who is this for: This mask is aimed at anyone seeking salon-grade smoothing and deep nourishment—people with frizz-prone, thick or voluminous hair will benefit most, as will those who want quicker manageability and extra shine. It also suits clients with color-treated or chemically processed hair who need a non-drying, restructuring treatment. If you want immediate softness plus the option to extend smoothness through a targeted routine, this professional mask is built for that purpose.