Garnier Keratin Sleek Hair Mask

Name: Garnier Keratin Sleek Hair Mask
Brand: Sainsbury's
SKU: 8249995
Price: 10.00 GBP
Availability: InStock
Rating: 4.7143 (147 reviews)

Read reviews (147)

For frizz-prone and dry hair, achieve a long-lasting sleek look with the Garnier Keratin Sleek range

£10.00£27.03 / ltr

Product details

Description

Up to 10x Smoother Hair: This intensive hair mask treatment will leave your hair feeling incredibly soft, manageable, and up to 10 times smoother* to the touch Frizz-Free Hair: The rich formula intensely smooths the hair fibre from root to tips, providing frizz control and boosting shine Up to 3 Days of Sleek & Shine: When used as part of the Keratin Sleek system, this mask helps to deliver a super sleek and shiny hair look that lasts for up to three days*** Keratin & Argan Oil: Powered by a 13% Keratin Smoothing Complex and Argan Oil, this hair mask actively smooths the hair fibre for sleek and shiny locks Vegan Formula: A vegan formula**, approved by Cruelty Free International

For frizz-prone and dry hair, achieve a long-lasting sleek look with the Garnier Keratin Sleek range. This Keratin Sleek Hair Mask is an intensive treatment powered by a 13% Keratin Smoothing Complex and nourishing Argan Oil. This rich, frizz-free formula works to intensely smooth the hair fibre from root to tip, providing frizz control while boosting shine and leaving hair feeling up to 10 times smoother*. Use this mask as part of the complete Keratin Sleek System. After cleansing with the Shampoo, apply this mask 1-2 times a week in place of the Conditioner for a deep treatment that leaves hair intensely smooth and shiny, before finishing with the Diamond Sleek Shine-Coat Smoothing Spray for a long-lasting sleek look with diamond-like shine. Vegan Formula**. Approved by Cruelty-Free International. *Instrumental test after application of standard shampoo + mask **No animal-derived ingredients or by-products *** Instrumental test after use of shampoo + conditioner + mask as a leave on

Ingredients

1285645 B - Ingredients: Aqua / Water, Cetearyl Alcohol, Stearamidopropyl Dimethylamine, Isopropyl Myristate, Cetyl Esters, Helianthus Annuus Seed Oil / Sunflower Seed Oil, Butyrospermum Parkii Butter / Shea Butter, Argania Spinosa Kernel Oil, Hydrolyzed Corn Protein, Hydrolyzed Soy Protein, Hydrolyzed Wheat Protein, Caprylyl Glycol, Citric Acid, Tartaric Acid, Phenoxyethanol, Benzoic Acid, Linalool, Geranyl Acetate, Amyl Cinnamal, Hexyl Cinnamal, Benzyl Alcohol, Parfum / Fragrance. (F.I.L. Z70079926/1).

Preparation and Safety

After shampooing with Keratin Sleek Shampoo, apply the hair mask generously to wet hair, focusing on lengths and ends. Leave on for 3-5 minutes, then rinse thoroughly. Use 1-2 times a week. For best results, follow with Diamond Sleek Shine-Coat Smoothing Spray.

Country of Origin

Country of Origin Germany

Manufacturer Address

Garnier, London, W6 8AZ

Ratings summary

4.7 out of 5

Love the maskI love using keratin sleek mask after I used the shampoo and conditioner from the same range because my hair shines and is sleek for longer time. It does hydrate the hair and make it look healthier than before

5 out of 5

Written by MaryA298th March 2026Yes, I recommend this product

Written by a customer on garnier.co.uk

Received free product

Little bit hwavy for fine hairOk so I'm very skeptical about putting masks on my hair as its so fine. But this wasn't bad! The smell is amazing but it is a little too heavy for my hair. I will use again but only once a month, maybe.

3 out of 5

Written by Tezz5th March 2026

Written by a customer on garnier.co.uk

Received free product

Smells lovelyI’ve been using this range for the past few weeks and it’s okay. It smells lovely and is great at detangling. However, i haven’t noticed any difference with the smoothness of my hair, it is hydrating though. I will continue to use the product but i am unsure if i would repurchase, if i did it would be for the detangling side of things rather than smoothing.

3 out of 5

Written by fairy1926th February 2026Yes, I recommend this product

Written by a customer on garnier.co.uk

Received free product

Works wellThis mask is great. I use it alongside the matching shampoo in the Keratin Sleek hair range. I have tick, wavy-curly hair, and this mask leaves my hair feeling soft, silky and manageable. I will leave it on for around 5-10 minutes for it to get to work and then rinse off. I really like the ingredients of keratin and argan oil, as they really moisturise the hair. In my opinion, this is worth checking out if you have a frizzy or unmanageable hair type.

5 out of 5

Written by Rachel23rd February 2026Yes, I recommend this product

Written by a customer on garnier.co.uk

Received free product

Keratin sleek maskI used the mask once every two washes with the keratin sleek shampoo and spray. It smells lovely with a fresh, fruity fragrance and is a nice thick consistency. The ends of my hair still felt a little dry so I may need to leave the mask on for longer, but my hair still looked good after styling.

4 out of 5

Written by Becka34322nd February 2026Yes, I recommend this product

Written by a customer on garnier.co.uk

Received free product

Amazing hair maskI'm loving this range and this mask is amazing. I can't believe how smooth and frizz free my hair is after using this along with the shampoo and conditioner. It's so quick and easy to use and smells lovely. Will definitely recommend this.

5 out of 5

Written by Carz198520th February 2026Yes, I recommend this product

Written by a customer on garnier.co.uk

Received free product

Lovely moistureGreat hair mask. Easy to open lid, even with wet hands. I applied the product on the mid and ends of hair and left on for 5-10minuites and used once a week as a mask treatment. The product left my hair soft and shiny, without being greasy. Only thing that can be improved is the fragrence. It doesnt smell of anything.

4 out of 5

Written by eosborne78220th February 2026Yes, I recommend this product

Written by a customer on garnier.co.uk

Received free product

Saved my dry, frizzy endsMy hair has been going through a really rough patch lately, feeling incredibly dry and looking completely frizzy at the ends. I've been using this mask once a week and it feels like a proper treat. You get a massive tub, so it's going to last absolutely ages. You just scoop a generous amount out and leave it to work its magic. When I rinse it out, my hair feels incredibly soft, deeply nourished, and so much easier to style. It genuinely feels like I've had a professional smoothing treatment done.

5 out of 5

Written by Gemster123a20th February 2026Yes, I recommend this product

Written by a customer on garnier.co.uk

Received free product

FantasticBrilliant product, really helped make my hair feel frizz free and sleek, looked absolutely amazing when used with the other products! Cant wait to keep using it again and again. Will be telling everyone i know about this product!

5 out of 5

Written by Abi2420th February 2026Yes, I recommend this product

Written by a customer on garnier.co.uk

Received free product

Keratin Sleek Hair MaskI have been using the Keratin Sleek Hair Mask for a few weeks and it has truly transformed my hair. The rich, creamy texture feels deeply nourishing from the moment I apply it, and it spreads easily through my lengths without any tugging or heaviness. After leaving it on for the recommended time, my hair feels significantly softer and more manageable than with regular conditioner alone.
My usual frizz and dryness seem much reduced, and the overall texture feels smoother and silkier. It also makes detangling so much easier, which saves me time and stress, especially when my hair is damp. The scent is gentle and pleasant, lingering without being overpowering, which I really appreciate.
Overall this feels like a luxurious treatment that genuinely delivers visible results. It has become a key step in my hair care routine and one I would happily repurchase and recommend to anyone with frizzy or dry hair.

5 out of 5

Written by Aishhy20th February 2026Yes, I recommend this product

Written by a customer on garnier.co.uk

Received free product

Showing 1 - 10 of 147 reviews

Item code: 8249995

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