Index / Olaplex / No. 6 Bond Smoother
Olaplex

Olaplex No. 6 Bond Smoother.

About this product

Olaplex No. 6 Bond Smoother is a leave-in styling treatment for hair, designed to smooth, add shine and help strengthen strands, including colored or bleached hair.

Full ingredients

Water, Cetearyl Alcohol, Dimethicone, Isohexadecane, Coco-Caprylate, Neopentyl Glycol Diheptanoate, Behentrimonium Chloride, Isododecane, Phenyl Trimethicone, Propanediol, Bis-Aminopropyl Diglycol Dimaleate, Fragrance (Parfum), Cetrimonium Chloride, Phenoxyethanol, Glyceryl Stearate, Isopropyl Alcohol, Hydroxyethylcellulose, Hydroxypropyl Guar, Sodium Stearoyl Lactylate, Hydroxypropyl Cyclodextrin, Hexyl Cinnamal, Limonene, Citral, Hydrolyzed Vegetable Protein Pg-Propyl Silanetriol, Disodium EDTA, Linalool, Citronellol, Iodopropynyl Butylcarbamate, Hydroxycitronellal, Etidronic Acid, Tocopherol, Geraniol, Potassium Sorbate, Helianthus Annuus (Sunflower) Seed Oil, Phytantriol, Sodium Benzoate, Pseudozyma Epicola/​Camellia Sinensis Seed Oil Ferment Extract Filtrate, Tocopheryl Acetate, Vitis Vinifera (Grape) Seed Oil

More from Olaplex 12 products · Guru Score 88% →

Guru Score

85%

Yay

5 experts · Moderate agreement

What the gurus are saying

Bleached and color-treated hair is where this leave-in-style smoother earns its fans, who credit it with stronger strands, fewer split ends between trims and real shine. Olaplex may be a controversial brand, but every take here is a Yay, and the gurus say it still works for them. A single pump on damp hair before blow drying is the routine on offer.
Synthesized from 5 expert reviews · most recent take February 2026

What they liked

  • Leave-in conditioner texture
  • One pump lasts months
  • Helps strengthen bleached or colored hair

What they flagged

    Nothing. None of the experts who reviewed it raised a problem.

    Type

    Key actives

    Vitamin E

    Formula notes

    Contains fragranceContains drying alcohol

    Where to buy

    Opens a store search. We may earn from these links.

    Scan it in the shopFree iPhone app. Scores in the aisle.

    What the gurus are saying.

    Every take we've logged from this product's reviews across YouTube. Click any row to watch the moment they said it.

    All takes Yay takes Nay takes Mixed takes Hide sponsored
    Dr. Jenny Liu
    Dr. Jenny Liu
    324k subs
    ✓Yay
    "I did take a break from Olaplex for a while, mostly because I was so about K18, and then recently reintroduced their hair mask and their leave-in, I think it's number six treatment. It's almost like a leave-in conditioner, and I've absolutely been loving it."
    No BS Beauty
    No BS Beauty
    89k subs
    ✓Yay
    "I've had good luck with [Olaplex] in the past uh I really enjoy"
    AliceintheRabbitHole
    AliceintheRabbitHole
    59k subs
    ✓Yay
    "I love Olaplex, it works really well for me. I have bleached my hair a lot and Olaplex works for me. I know it's a controversial brand, but it works for me."
    Dr. Somji Skin
    Dr. Somji Skin
    360k subs
    ✓Yay
    "What I like to do at night is use this Olaplex No. 6. This is essentially going to help colored hairs. It's got a lot of essential ingredients for not only hair health but also scalp health as well."
    Kelly Driscoll
    Kelly Driscoll
    91k subs
    ✓Yay
    "I used the Olaplex No. 6 Bond Smoother on my damp hair as [...] a strengthening treatment, and look at how much shine my hair has."
    Sponsored
    All 5 takes from Kelly Driscoll
    5 Star Skincare Empties! ⭐⭐⭐⭐⭐
    "This is a five out of five hair care product for me. I think it really helps to strengthen my hair, helps to keep it in really good shape. I think it helps resist some split ends and damage on my hair in between trims. I really like it. It's about $30, you get 100 ml, this bottle lasts forever for me. I don't wash my hair a ton, so this actually usually lasts me close to a year, honestly. So pretty decent investment, I think. Personally, just use one pump."
    My EVERYTHING Skincare and Self Care Snow Day! | AD ft iRESTORE
    "I'm finishing off with the Olaplex No. 6 Bond Smoother."
    Filming Routine | Do Skincare, Hair and Makeup With Me!
    "I used the Olaplex No. 6 Bond Smoother on my damp hair as [...] a strengthening treatment, and look at how much shine my hair has."
    My Go-To Hair Care Routine
    "This is the Olaplex No. 6 Bond Smoother serum and I do this every time that I wash my hair when it is damp I will apply this to my hair. This is another product that helps to strengthen the hair it has like the bonding right, and so it is really good for color treated hair. I do color treat my hair like every six weeks, so my hair is in a very good healthy state but having something like this in my routine just like regularly is really important for just maintaining some health."
    Slow Morning, Late Summer Skincare Routine
    "I use a pump of the Olaplex No. 6 Bond Smoother serum for my hair before I blow dry it"

    What the evidence says.

    Independent of what the gurus think, this is what the published research supports about the main active ingredients here.

    Vitamin E

    Vitamin E is an antioxidant, and it is often in a formula to keep the other ingredients stable rather than as the active itself. It pairs well with vitamin C, though on its own the evidence for visible change is limited.

    Source: NIH, National Library of Medicine

    Frequently asked.

    What is Olaplex No. 6 Bond Smoother?

    Olaplex No. 6 Bond Smoother is a leave-in styling treatment for hair, designed to smooth, add shine and help strengthen strands, including colored or bleached hair.

    Is Olaplex No. 6 Bond Smoother worth it?

    Yes. All 5 gurus who reviewed it give it their stamp of approval, for a Guru Score of 85%.

    What is Olaplex No. 6 Bond Smoother's Guru Score?

    Olaplex No. 6 Bond Smoother holds a Guru Score of 85%. That is our read on how warmly the experts talk about it, based on the verdicts of 5 expert reviewers we have collected.

    Similar products worth a look.

    Other products the same gurus have weighed in on, plus more from this brand and category.

    Compare side by side →

    Spotted something on this page that doesn't look right? Let us know.

    Share this score

    Add this badge to your blog or website. It links back to this page and updates itself when the experts change their minds. Free, no sign-up.

    Then paste it into your site's HTML or embed block.

    This week's top beauty news, in your inbox.

    A weekly read of the takes worth catching up on: the raves, the splits, the ones the gurus won't shut up about. Free, no spam, unsubscribe whenever.

    Subscribe to the digest