Number 4™ Fluoro5 Elixer Restore & Repair Oil

There was a time when we were a bit skeptical about hair oils—the last thing we wanted was a greasy, weighed down ’do. These days, however, we can't imagine a haircare routine without it. This strand-saving elixir gives drab, dull hair a coveted movie star shine (plus a whole host of reparative benefits). Our oil-free days are officially over.

Number 4™ Fluoro5 Elixer Restore & Repair Oil
4.2 out of 5 stars, based on 15,585 Reviews 15,585 Reviews
4.2 out of 5 stars
5 Star
7155
4 Star
5531
3 Star
2221
2 Star
480
1 Star
198
my profile
people who
purchased
sampled
Hair type
Thick
Fine
Straight
Wavy
Curly
Frizzy
Kinky
Dry
Normal
Oily
Hair color
Brown
Blonde
Black
White or gray
Red
Other
Age
17 & under
18-24
25-34
35-44
45-54
55 & over
Apply
Be careful
Sampled

Use very sparingly and in small amounts or else your hair will look very greasy

4
Was this review helpful to you? Yes | No 62 of 62 found this review helpful. Was this review helpful to you? Yes | No
Weightless Shine

Love it! I have very very fine, long, color treated hair, so I need a little extra strength/moisture and shine without weighing down my hair any more than usual. I've tried all sorts of serums and glossing creams and stuff in the past with usually average results at best - either I'm not getting the shine results I want or I look like a wet dog, all weighed down with goop. Bought a bottle of this on a whim since I've been such a fan of the other Number 4 products I've sampled, and I'm SO glad I did. This is it.

After a couple of uses, hair is exceptionally shiny and looks healthier than usual. However, my hair is NOT weighed down at all. If anything, it's moving more than usual. And it feels super soft. I'm hoping continued use does improve the health of my hair, but even if not I'd keep using this stuff based on looks alone.

5
Was this review helpful to you? Yes | No 64 of 66 found this review helpful. Was this review helpful to you? Yes | No
LOVE
Sampled

Smells great, leaves my hair looking and feeling healthy, and is extremely potent. The product seems much more expensive than it is selling for and you only need a tiny amount!

5
Was this review helpful to you? Yes | No 9 of 9 found this review helpful. Was this review helpful to you? Yes | No
soft, silky, weightless - smells amazing
Purchased

I've been using this religiously for two years now - and have only just finished my second bottle! I have long, fine, straight, color-treated hair and this is a godsend. I use two pumps after I towel dry, and it makes my hair so smooth and silky, protects, the ends, and fights static and frizz. Plus, it smells amazing. My only complaint is the pump. It leaks if you try and travel with it. My solution is to pour a bit in another Birchbox hair oil sample container I received - and good to go!

5
Was this review helpful to you? Yes | No 9 of 9 found this review helpful. Was this review helpful to you? Yes | No
Highly recommend
Sampled

I use just a few drops on the ends of my wet hair and I enjoy the texture and shine that the producr provides. I have really dark, thick, long hair, so most products that I have tried I need to use tons to get the desired effect. This stuff really works with minimal application. Smells great too

5
Was this review helpful to you? Yes | No 8 of 8 found this review helpful. Was this review helpful to you? Yes | No
This is great!
Sampled

I really like this - I try to wash my hair as infrequently as possible, and this is GREAT for my non-washing days to keep my hair smooth, shiny and looking well-conditioned. It smells great too!

5
Was this review helpful to you? Yes | No 8 of 8 found this review helpful. Was this review helpful to you? Yes | No
Shine not grease!
Sampled

two thumbs up from this dry-haired blondie! Not only did I like the smell of this product, I also liked the appearance that it had once applied throughout my hair. Instead of giving off a thick and greasy look, it shimmered with a healthy glow. A little goes a long way!

5
Was this review helpful to you? Yes | No 8 of 8 found this review helpful. Was this review helpful to you? Yes | No
No 4 products rule
Sampled

Great product!! This line is great. Works so well without weighing hair down

5
Was this review helpful to you? Yes | No   Was this review helpful to you? Yes | No
Amazeballs
SampledPurchased

I LOOOVE this product. Just a tiny drop smoothes and repairs my damaged ends -- it makes my hair look healthier in literally a matter of seconds. And it smells absolutely incredible.

5
Was this review helpful to you? Yes | No   Was this review helpful to you? Yes | No
Good
Sampled

Good product I love oils for my hair-it's so frizzy and long I need them

3
Was this review helpful to you? Yes | No   Was this review helpful to you? Yes | No