L'Oréal Professionnel Série Expert Keratin Alpha Sleek Mirror Sleek Serum 50ml is a professional heat-activated smoothing serum designed to deliver sleek, glossy and frizz-controlled results for salon styling. Formulated with 5% Keratin Sealer technology, this advanced leave-in treatment helps seal the hair’s keratin structure, improving smoothness while controlling unwanted volume.

The lightweight professional serum provides instant shine that can last up to five days while protecting hair from humidity and heat styling tools up to 230°C. When used as part of the complete Keratin Alpha Sleek routine, it helps reprogramme hair for up to two weeks of frizz control, allowing stylists to create smooth, polished styles more efficiently.

• Professional smoothing serum with 5% Keratin Sealer technology
• Heat-activated formula for sleek, long-lasting results
• Helps control frizz and unwanted volume
• Delivers high-gloss shine that can last up to 5 days
• Provides humidity protection up to 80%
• Heat protection up to 230°C for safer styling
• Artificial colourant-free and alcohol-free formula
• Suitable for all hair types

How to Use

• Shake well before use
• Apply to washed, towel-dried hair
• Spray 2–4 pumps into hands for fine to medium hair, or 6–8 pumps for thicker hair
• Rub hands together and distribute evenly through mid-lengths and ends
• Do not rinse
• Blow-dry to activate the formula
• Use a straightening iron for longer-lasting smoothness

Ideal for professional hairdressers and stylists, this serum helps create smooth, mirror-like finishes while protecting hair during heat styling.

Delivery Info: Aston & Fincher works with our suppliers to ensure your orders are complete and delivered safely and on time. We offer standard delivery times of 1-3 working days, though it will usually be the next day. Any delivery queries, please email us on businessservices@afteam.co.uk or call 0345 201 0825

Free delivery applies to baskets with a value of £50+ ex. VAT (£60+ inc. VAT), to UK mainland addresses. It excludes furniture and exceptional items; we will contact you in these cases.

During our online VAT Free promotional period, free delivery applies to baskets with a value of £83.33 ex VAT, which is the same as £100+ inc VAT.

Furniture and Special Order Deliveries: Furniture and special-order items have different times based on availability and production hours. Please contact us for any queries.

Lead-times are therefore given as a guideline only. You will be advised of lead-times on placement of order, but if items are required by a specific date, please contact us before placing orders online.

Once an order has been placed, it can take up to 5 working days for Aston & Fincher to receive the manufacturer's production confirmation. This will have an approx. date of dispatch from the manufacturers.

At this stage, Aston & Fincher will contact you to give you an estimated delivery date to the UK.

For more information, please refer to the Terms and Conditions