Garnier Diamond Sleek Hair Shine Spray, 150ml

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Product guide

Garnier Diamond Sleek Hair Shine Spray, 150ml

Garnier Diamond Sleek is an aerosol hair shine and heat protection spray for smoothing, gloss and frizz control. The listing claims protection up to 230°C and gives damp-hair and dry-hair application options, so it can fit both pre-styling and finishing routines.

At a glance

The listing describes an 8% Keratin Smoothing Complex with argan oil.
Claimed heat protection is up to 230°C during heat styling.
Can be misted on damp hair before blow-drying or lightly applied to dry hair as a finishing step.
The manufacturer claims up to 72 hours of sleek, frizz-controlled results and up to 100 hours of shine, based on its stated instrumental testing.

Price

£4.73Save 61%

Reference price: ~~£11.99~~

Price checked: 12 Nov 2026

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Often bought together

Garnier Keratin Sleek Hair Mask, For Frizzy Prone Dry Hair, 370ml | Up To 3 Days Of Sleek and Shine, With 13% Keratin Smoothing Complex, For Frizz Prone and Dry Hair, Long Lasting Sleek Look

£3.80

Garnier Keratin Sleek Hair Conditioner, For Frizzy Dry Hair, 200ml | Up To 93% Shinier Hair, Up To 3 Days Of Sleek and Shine, With 10% Keratin Smoothing Complex, Shiny Hair Conditioner

£3.03

Pros and cons

Pros

Two application options make it usable before blow-drying or as a dry-hair finishing spray.
The listed combination of shine, smoothing, humidity resistance and heat protection serves several styling aims in one product.
Customer feedback mentions glossy-looking results and smoother-feeling hair.

Cons

Customer feedback is mixed on residue, with some reporting a sticky feel despite the listing describing a non-sticky texture.

Technical specifications

8 specifications

Identity
Brand	Garnier

Product details
Liquid volume	150 Millilitres
Item form	Aerosol
Hair type	All
Scent	fresh
Material type free from	Sulphate Free
Country of origin	Belgium
Package dimensions and weight	18.7 x 5.8 x 4.8 cm; 180 g

What to know before buying

For heat protection, the listing positions the spray for application to damp hair before blow-drying. Its long-lasting sleek and shine claims are stated as up to figures and are not guaranteed for every routine.

Who is it for?

A good fit for

People seeking a finishing spray that combines shine and frizz control with a stated heat-protection claim.
Those who want a spray with damp-before-blow-drying and dry-hair finishing directions.
Buyers looking for an aerosol spray labelled for all hair types and with a fresh scent.

Less suited to

Those who want to avoid aerosol formats or are particularly concerned about possible sticky residue.

Garnier Diamond Sleek Hair Shine Spray, 150ml · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.4 / 5 · 257 ratings

5 stars74%74%
4 stars11%11%
3 stars6%6%
2 stars3%3%
1 star6%6%

Customer feedback highlights perceived shine, smoother-feeling hair, frizz control, fragrance and heat protection. Reports about residue are mixed, with some finding it non-greasy and others describing stickiness. That difference may matter if a light, clean-feeling finish is a priority, even though the product is described as lightweight and non-sticky. The rating distribution is mostly five-star but includes lower ratings, so the overall figure does not establish that the spray suits every hair type or routine.

Positive themes

Customers mention glossy-looking results and appreciate the fragrance.
Feedback describes smoothing thick, frizzy hair and a silky feel.
Some customers report good heat protection and say it does not leave hair greasy.

Negative themes

Some customers report sticky residue.

Mixed feedback

Experiences with whether the spray feels greasy or leaves residue vary.

Frequently asked questions

How do you apply Garnier Diamond Sleek?

The directions say to shake well and lightly mist from 10–12 inches away, focusing on mid-lengths and ends. Use on damp hair before blow-drying for heat protection or on dry hair as a finishing step.

What heat protection does the listing claim?

The manufacturer claims protection from heat styling up to 230°C. This is a product claim, not an independently verified measurement.

Can it be used on dry hair?

Yes. The listing says to mist lightly onto dry hair as a finishing step for gloss and frizz control.

What results and ingredients are claimed?

The listing identifies an 8% Keratin Smoothing Complex and argan oil, and claims up to 72 hours of sleek, frizz-controlled results and up to 100 hours of shine. These are stated maximums, not assured outcomes.