L'Oréal Keratin Alpha Sleek Anti-Frizz Shampoo Mask Serum Set

The L'Oréal Professionnel Keratin Alpha Sleek Anti-Frizz Set is the complete professional ritual to tame frizz and discipline unruly hair. Three products formulated to work in synergy — shampoo, treatment, and serum — with keratin technology that smooths the hair fiber, reduces volume, and protects against humidity for a long-lasting sleek effect.

What the set contains

The kit includes three products from L'Oréal Professionnel's Keratin Alpha Sleek line, designed for a complete anti-frizz ritual from cleansing to finishing:

Keratin Alpha Sleek Shampoo 300ml — Gently cleanses hair, preparing the hair fiber for the subsequent treatment. The keratin formula reduces frizz from the first wash, leaving hair soft and manageable.

Keratin Alpha Sleek Smooth Transformer 200ml — The disciplinary treatment at the heart of the ritual. Applied to the lengths, it smooths the hair fiber, reduces volume, and controls frizz in a lasting way. Compatible with flat iron use to enhance its sleek effect.

Mirror Sleek Serum 50ml — The finishing serum that seals the result. Applied to dry or damp lengths, it provides intense shine, visibly eliminates split ends, and protects hair from humidity and heat.

Technology and active ingredients

The entire Keratin Alpha Sleek line is based on Pro-Keratin + Silk technology, which combines:

• Professional Keratin — rebuilds the hair fiber from within, reducing frizz and improving manageability
• Hydrolyzed Silk — smoothes the hair cuticle, providing shine and softness to the touch
• Anti-humidity filters — protect hair from environmental humidity, maintaining the sleek effect for longer

Who it's for

This set is designed for those with naturally frizzy, wavy, unruly hair, or hair prone to humidity. It is suitable for all hair types — fine, medium, and thick — and compatible with colored or chemically treated hair. If you're looking for a complete ritual without having to purchase products individually, this package is the most practical choice. For those who want to further expand their routine, the 4-Product Anti-Frizz Kit is also available.

How to use

Apply the Shampoo to wet hair, massage, and rinse. Distribute the Smooth Transformer through the lengths, blow-drying or using a flat iron to best activate its disciplinary benefits. On dry hair, apply a few drops of Mirror Sleek Serum to the lengths to seal the result and add shine.

Individual products from the line

Prefer to buy products separately or only replenish what's run out? On Planethair, you'll find the Keratin Alpha Sleek Shampoo, the Anti-Frizz Mask, and the Mirror Sleek Serum available for individual purchase.

Why buy it from Planethair

Planethair has been online since 2000 and was one of the first Italian e-commerce sites specializing in professional hair products. All L'Oréal Professionnel products are original and come from authorized distribution channels. Our team is available to advise you on the most suitable product for your hair type.

Frequently asked questions

Is the set suitable for colored hair?
Yes, the formula is gentle and compatible with colored, bleached, or chemically treated hair.

Do I need to use a flat iron to achieve results?
No, the Smooth Transformer also works with just a hairdryer. A flat iron enhances the sleek effect but is not essential.

How long does the set last?
With regular use 2-3 times a week, the 300ml shampoo and 200ml treatment last approximately 2 months. The 50ml serum is designed for daily finishing and lasts approximately 1-2 months.

Can I use the serum every day?
Yes, the Mirror Sleek Serum is a lightweight finish suitable for daily use on dry or damp hair.