This £12 Shine Spray Has Made My Hair Sleeker and More Expensive-Looking Than Ever

      I often complain about my hair. I really shouldn't, considering I have been fortunate to have incredibly thick hair with natural waves. However, the truth is, managing it can be a challenge for me. At times, I crave a smooth, sleek look, but it feels nearly impossible to achieve. I've experimented with every conditioner, hair mask, hair oil, and hot brush imaginable, and while they seem effective initially, the moment I go outside, my flyaways make a swift comeback. So, at the start of the year, when I was informed about the new launches from Garnier and they mentioned a new smoothing spray, I wrote it off right away. I thought it wouldn’t work for me, and I stored the bottle away in the beauty cupboard for someone else to use. However, a few weeks later, I was with some fellow beauty editors who asked, "Have you tried the Garnier Diamond Sleek Smoothing Spray?" They couldn’t stop praising it, and eventually, they persuaded me to give it a try.

      I’m incredibly glad I did, as I can sincerely say this spray has significantly improved the state of my hair. If you’re curious to learn more, continue reading for my complete review.

      **Garnier Diamond Sleek Smoothing Spray Review**

      **Garnier Diamond Sleek Shine-Coat Smoothing Spray**

      **Pros**

      - Creates a very sleek finish

      - Pleasant fragrance

      - Affordable

      - Lightweight

      - Provides heat protection up to 230°C

      **Cons**

      - Doesn’t add a significant amount of shine

      **The Formula**

      As mentioned, this product is primarily a smoothing spray, but it has additional benefits. Infused with keratin and argan oil, the formula protects against humidity and provides a polished appearance by coating the hair fiber, almost like a magical barrier. It’s heat-activated, so for the best results, you should use a hair dryer or a wet-to-dry tool after applying the spray. Personally, I enjoy using my Revlon hot brush, as the results from pairing these two are excellent. There’s no need for an extra heat protectant either, since the formula protects hair up to 230°C.

      **The Application**

      As you might expect, you apply this product to damp hair after washing out your shampoo and conditioner. I like to divide my hair into sections and generously spray it on each strand, focusing mainly on the mid-lengths and ends. As soon as you apply it, a wonderful scent greets you. Honestly, using this makes me feel as if I’ve just come from a luxurious salon.

      **The Results**

      The first time I tried it, I was genuinely impressed (no pun intended). I don’t think my hair has ever appeared so smooth after blow-drying at home, and it has quickly become a staple in my haircare regimen. I will mention that I don’t find it adds a lot of shine, but aside from that, I can’t criticize it. The simplicity of application, the fragrance, the results, and the price all deserve a perfect score from me.

      While I have always been devoted to my leave-in conditioner and hair oil, I believe this is the sort of product my routine was lacking. It not only delivers immediate results but also keeps my hair looking sleek for days. If you struggle to achieve a sleek finish at home as well, I highly recommend trying this product. I generally don’t consider beauty products to be miracle workers, but this one comes pretty close for me.

      **Shop the Garnier Diamond Sleek Smoothing Spray**

      

      Garnier Diamond Sleek Shine-Coat Smoothing Spray

      Purchase this spray while it’s on sale.

      **Shop More Smoothing Sprays**

      

      - **Color Wow Dream Coat Supernatural Spray**

       A bit pricier, but this Color Wow spray certainly lives up to the hype.

      - **Kérastase Gloss Absolu Hair Treatment Spray**

       A stylist used this on me recently, and I bought it before leaving the salon.

      - **Amika Frizz-Me-Not Hydrating Anti-Frizz Treatment**

       This two-in-one treatment functions both as a leave-in and a smoothing spray, offering high heat protection.

      - **Living Proof Smooth Styling Spray**

       A luxury product from Living Proof that comes as an ultra-lightweight mist.

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      At Who What Wear UK, we understand that beauty isn’t one-size-fits-all. Our editors have evaluated thousands of products over the years, covering skincare, makeup, hair, and nails, while collaborating with trusted experts—dermatologists, makeup artists, and top industry insiders—to ensure every guide is thorough, inclusive, and relevant to you.

      We prioritize formulas that work, whether they are budget-friendly options or luxurious investments. Our selection of products is based on real results, knowledge of ingredients, and what we would genuinely recommend to a friend.