Dull-looking hair with frizz? No problem! Our Diamond Sleek Shine-Coat Smoothing Spray, with its 8% Keratin Smoothing Complex and Argan Oil, shields and smooths hair to reduce frizz even in high humidity. It works by coating the hair fibre to boost light reflection from all angles, delivering a stunning diamond-like shine that lasts for up to 100 hours*. The lightweight, non-greasy, and non-sticky texture ensures a natural feel without any weigh-down. This heat-activated formula also provides essential protection from heat styling tools, including from blow drying and straightening, up to 230°C*. For best results, use as a final step after the 3-step Keratin Sleek System. After the Shampoo, Conditioner, or Mask, apply Diamond Sleek Spray to achieve a long-lasting sleek look with incredible, polished shine. Vegan Formula**. Approved by Cruelty-Free International.
*Instrumental tests using standard shampoo + Diamond Sleek Spray
**No animal-derived ingredients or by-products
Dull-looking hair with frizz? No problem! Our Diamond Sleek Shine-Coat Smoothing Spray, with its 8% Keratin Smoothing Complex and Argan Oil, shields and smooths hair to reduce frizz even in high humidity. It works by coating the hair fibre to boost light reflection from all angles, delivering a stunning diamond-like shine that lasts for up to 100 hours*. The lightweight, non-greasy, and non-sticky texture ensures a natural feel without any weigh-down. This heat-activated formula also provides essential protection from heat styling tools, including from blow drying and straightening, up to 230°C*. For best results, use as the final step in the Garnier 3-Step Keratin Sleek System. After the Shampoo, Conditioner, or Mask, apply Diamond Sleek Spray to achieve a long-lasting sleek look with incredible, polished shine. Vegan Formula**. Approved by Cruelty-Free International.
*Instrumental tests using standard shampoo + Diamond Sleek Spray
**No animal-derived ingredients or by-products
Consumer benefits:
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Up to 100H Diamond-Like Shine: Coats the hair fibre to boost light reflection from all angles, providing your hair with a spectacular, polished shine that lasts for up to 100 hours*.
Up to 72H Frizz-Free Sleek: Our formula shields and smooths hair to reduce frizz even in high humidity, delivering a sleek, polished look that lasts for up to 72 hours*.
Heat Activated Formuila: This formula requires blow-dryer heat to activate its smoothing power and provides thermal protection from styling tools up to 230°C*, keeping your hair healthy.
Keratin & Argan Oil: Powered by an 8% Keratin Smoothing Complex and Argan Oil, this spray actively smooths the hair fibre for a sleek, and shiny result.
Lightweight & Non-Greasy: Enjoy a super sleek finish without the heavy feel. The texture is lightweight, non-greasy, and non-sticky, ensuring your hair has a natural, bouncy feel.
Instructions
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After using the Keratin Sleek routine, towel dry and spray the product liberally on damp hair. Blow-dry hair by sections with a brush, putting tension on the hair. Heat is required to activate the formula.
*Please be aware that ingredient lists for products in our brand are updated regularly. Please refer to the ingredient list on the product package for the most up-to-date list of ingredients to ensure it is suitable for your personal use.
301 out of 305 (99%) reviewers recommend this product
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Maricel
Review1
Votes0
5 out of 5 stars.
Smooth, silky, manageable hair
9 hours ago
I have been using this for a month now and I am so impressed of how it made my hair so smooth and silky.
Yes, I recommend this product.
Originally posted on boots.com
Anonymous
Review1
Votes0
5 out of 5 stars.
Amazing product
a day ago
I was gifted this through lorealistar I’ve been using Garnier Diamond Sleek for a while now, and honestly, it’s become a bit of a staple in my routine.
What I noticed straight away was how much smoother my hair looked after styling. I usually struggle with frizz, especially in humid weather, but this really helps keep everything under control without making my hair feel heavy or greasy. It still feels soft and natural, which I really appreciate.
The shine is probably my favourite part it gives my hair that glossy, healthy look without seeming overdone. I’ve had a few people ask if I’d just come from the salon, which says a lot.
I also like how easy it is to use. I just spray it on before heat styling, and it does its thing. Knowing it offers some heat protection is a nice bonus too.
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Pipp9090
INCENTIVIZED
Received Free Product
Review1
Votes0
4 out of 5 stars.
Gorgeous shine on blow dried hair
INCENTIVIZED
Received Free Product
a day ago
A solid budget pick for smoother, frizz-free hair. It works best with heat styling, leaving hair soft, sleek, and lightly shiny without feeling greasy. Great for taming humidity and flyaways.
Downsides? The shine is more subtle than “glass hair,” and it doesn’t do much if you air-dry.
Verdict: Affordable, effective, and easy to use, just don’t expect salon-level shine. 4/5
Yes, I recommend this product.
Originally posted on boots.com
Faith1430
INCENTIVIZED
Received Free Product
Review1
Votes0
5 out of 5 stars.
Shiny and Smooth Hair
INCENTIVIZED
Received Free Product
2 days ago
This leaves your hair feeling so smooth and shiny. Absolutely love it and adding it to my permanent hair routine.
Yes, I recommend this product.
Originally posted on boots.com
Claudia Lopes
INCENTIVIZED
Received Free Product
Review1
Votes0
4 out of 5 stars.
Great
INCENTIVIZED
Received Free Product
2 days ago
So happy left my hair really smooth, and with shine
Yes, I recommend this product.
Originally posted on boots.com
Becca
INCENTIVIZED
Received Free Product
Review1
Votes0
5 out of 5 stars.
Amazing!
INCENTIVIZED
Received Free Product
2 days ago
Got this couple weeks ago and I’m totally obsessed! My hair is so smooth and shiny since using this! Will definitely recommend this
Yes, I recommend this product.
Originally posted on boots.com
Brogan
INCENTIVIZED
Received Free Product
Review1
Votes0
5 out of 5 stars.
Glass hair!!
INCENTIVIZED
Received Free Product
2 days ago
Unbelievably glossy!! My hair has never felt so good
Yes, I recommend this product.
Originally posted on boots.com
Janemyugc
INCENTIVIZED
Received Free Product
Review1
Votes0
5 out of 5 stars.
Perfect
INCENTIVIZED
Received Free Product
2 days ago
I’m really impressed with this spray! It leaves my hair looking smooth, shiny and much more polished without feeling heavy or greasy.
The texture is lightweight and easy to apply, and it doesn’t weigh my hair down. I’ve noticed a visible difference in how sleek and frizz-free my hair looks after using it, especially after styling.