UK Beauty & Fashion Blog

OSiS+ Flatliner // Review

As a heat using junkie I've used my fair share of products. I use heat at least once a day, sometimes twice. I have misbehaving hair, it's probably trying to punish me for the excessive heat. One of the latest products I've been testing out has been OSiS+ Flatliner. A Flattening Iron Serum. I'm a huge fan of the OSiS+ range from Schwarzkopf already, their Glamour Queen hair spray is a keen favourite of mine and will continue to be repurchased again and again.
Flatliner is a heat protectant flattening iron serum with hold. It contains heat proof ingredients up to 200 degrees and also contains humidity protection. This flattening iron serum allows you to achieve long lasting, sleek and glossy locks. 

The packaging is always one thing I love about OSiS+ products. It's the same as my Glamour Queen hairspray sitting upstairs. The products are always clear to read and display the control strength on the front. In this case Flatliner is number 3 out of 4. Flatliner also has a open and close swivel catch. It won't start spraying on it's own when put away or travelling like some products have done to me. As for the spray nozzle, it allows the right mist of product out, without over loading my hair. It's great, some nozzles have that 'dribble' the trigger is sturdy and strong and will remain this way, if anything like my Glamour Queen. OSiS+ always keep their packaging looking classic, sleek and professional.
Smells nice, it has that 'professional hair product scent'
Lockable nozzle and attractive packaging
Keeps my hair straighter all day
Less split ends and reduced frizz, I haven't had frizz during this hot weather!
No sticky residue or build up
I'd have to order online, which isn't a bad thing, but I can't just walk to my local Boots and grab one, especially when offers are on.
Over the £10 mark, however it does a wonderful job
What it does for me: 
This has protected my hair well, I prefer this to my Aussie heat spray that I've been using religiously for months. It's coming up to my hair cut and I really don't have any split ends and my ends are frazzled. They feel smooth and silky. Being a serum you'd think your hair is left feeling sticky? Not at all it's brilliant and 'soaks' in quicker than a spray. A few spritz all over and a few minutes wait, I can then have straight smooth hair. I've had compliments of how well behaved my hair has been and I have to agree. The humidity protection in this spray has been put to the ultimate test with the weather this week too, it passes 200%!

Have you enjoyed the OSiS+ range before?
Would you try this?
Disclaimer: Sample.
Disclaimer: press sample, for review consideration only, no payment received. see disclaimer page for more.


  1. Nice!
    i follow you on bloglovin,
    follow me back? xx

    1. I'll check your blog out and see :)

  2. This sounds really good I may have to treat myself xxx

    1. It really is, I've tried some awful ones over the years :p

  3. This sounds good, love a hair product that smells nice x

  4. We keep doing this. (going to write on similar products I mean, though you always get there first) Haha. I'm literally about to write on the elastic finish hairspray! My hair is dry and bleh though Aussie is helping it out. The most heat it gets is the hair dryer though I often just leave it, especially in this weather! Unless I'm going out and I need it drier quicker...

    1. Haha, we have taste ;)
      Haven't tried that, love the glamour queen too much, I'm a little bit off aussie atm, it's just blah for me now, after years of using! I hardly dry my hair now, I like the curls I get when it dries :D

  5. I need to try this, sounds really good. x

    1. It is, I love the OSIS range so much :|


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