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tilenew | color:black
4.8
Rated 4.8 out of 5 stars
370 Reviews

HeatBounce conditioning heat protectant

The future of heat protection
OR

Description

This leave-in conditioning heat protectant detangles, softens, and delivers deeper heat protection than ever before*—for 85% less breakage after blow drying*.

*k18hair.com/disclaimers

Apply throughout sectioned hair, brushing through to help with even distribution. Less is more. Start small and build as needed. Hair should feel soft and tangle-free, but not coated.

Use on towel-dried hair before blow drying and on dry hair before hot tools

resilicore™ heat-shielding technology is inspired by proteins in nature that can withstand extreme temperatures. Unlike traditional heat protectants that only coat the cuticle, the size + molecular makeup of resilicore™ allows it to penetrate deeper than ever before*, into hair's inner cortex where heat damage can occur, forming a protective shield that fortifies from within.

Conditioning blend conditions, softens, and detangles even damaged hair

Created for all hair types + textures. Can be used on extensions.

*k18hair.com/disclaimers

Protects from heat up to 450°F

85% less breakage after blow drying*

* Lightweight formula conditions, softens, and detangles even damaged hair*

Water (Aqua) (Eau), Cellulose Gum, Isopentyldiol, Propanediol , Cetearyl Alcohol, Isopropyl palmitate, Sodium Benzoate, C13-15 alkane, sh-Oligopeptide-78 s-Fruit Fly Oligopeptide-1, (sh-Oligopeptide-78 s-Fruit Fly Oligopeptide-1) Peptides, Laurdimonium Hydroxypropyl Hydrolyzed Barley Protein, Helianthus Annus (Sunflower) Seed Oil , Oryza Sativa (Rice) Bran Extract, Helianthus Annuus (Sunflower) Extract, Rosmarinus Officinalis (Rosemary) Leaf Extract, Tocopherol, Behentrimonium Chloride, Brassicatrimonium Chloride, Gluconolactone, Arginine, Coco-Glucoside, Lactic Acid, Cellulose, C12-20 Alkyl Glucoside, Citric acid , Potassium Sorbate, Benzyl Alcohol, Isopropyl Alcohol, C14-22 Alcohols, Fragrance (Parfum), Amyl Salicylate, Benzyl Salicylate, Citronellol, Citrus Aurantium Peel Oil, Dimethyl Phenethyl Acetate, Geraniol, Geranyl Acetate, Isoeugenyl Acetate, Limonene, Linalool, Linalyl Acetate, Pinene, Tetramethyl Acetyloctahydronaphthalenes, Vanillin.

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Description

This leave-in conditioning heat protectant detangles, softens, and delivers deeper heat protection than ever before*—for 85% less breakage after blow drying*.

*k18hair.com/disclaimers

got questions?
Get started here
No, HeatBounce does not need to be activated to protect from heat.
No, you can blow dry or use hot tools immediately after applying HeatBounce.
HeatBounce is powered by resilicore™ heat-shielding technology, an innovation inspired by resilin—a natural protein that can withstand extreme temperatures. Unlike traditional heat protectants that only coat the outside cuticle layer of hair, the size + molecular makeup of resilicore™ allows it to penetrate deeper than ever before*, into the cortex where heat damage can occur, forming a protective shield that fortifies from within.

*k18hair.com/disclaimers
While the molecular repair hair oil and HeatBounce have heat protection benefits, HeatBounce defends against heat from the cuticle to the cortex*, going as deep as heat damage goes to help protect against color fade, dry feeling, dullness, and breakage. The oil delivers traditional heat protection on the outer layers of hair and clinically proven damage repair. *k18hair.com/disclaimers
After shampooing, apply the K18 mask (wait 4 minutes) or DAMAGE SHIELD conditioner. Then, apply HeatBounce and AstroLift™ before blow drying or air drying. Use HeatBounce again before any hot tools. Finish with K18 oil and use AirWash™ to refresh hair between washes.
Apply HeatBounce every time before you apply heat, including if you switch between blow drying to hot tools.
 the future of heat protection
0
less breakage after blow drying*
0
degree heat protection from cuticle to cortex*
heat protect + condition in one step
how to use HeatBounce
1. Apply throughout sectioned hair, brushing through to help with even distribution.

2. Less is more. Start small and build as needed. Hair should feel soft and tangle-free, but not coated.

3. Use on towel-dried hair before blow drying and on dry hair before hot tools.
learn more on our blog
feel what's possible with K18
See how K18 unlocks our community's expression
4.8
Rated 4.8 out of 5 stars
Based on 370 reviews
370 reviews
  • Brenda M.
    Verified Buyer
    Reviewing
    HeatBounce conditioning heat protectant 4oz
    I recommend this product
    Age 55 - 64
    Hair Concern Color-care, Fragile/brittle hair
    Hair Type Fine/Thin
    My Results Visible Difference
    Rated 5 out of 5 stars
    2 days ago
    Heat bounce

    See difference in my bar already

    K Profile picture for K18Hair
    K18Hair
    Yesterday

    Brenda, we're so excited to hear that you're already seeing a difference with HeatBounce! It's amazing how quickly it can start working to protect and condition your hair. Thank you for the fantastic 5-star review! ✨

  • martha
    Reviewing
    HeatBounce conditioning heat protectant 4oz
    I recommend this product
    Age 25 - 34
    Hair Concern Heat damage, Fragile/brittle hair
    Hair Type Fine/Thin
    My Results Less Breakage
    Rated 5 out of 5 stars
    2 days ago
    love it

    recommend it to al my thin hair girlies, this heat protectant spray gives you everything you need without weighting down hair or making it look or feel greasy, a must have for sure, a few sprays is all you need since it sprays nicely

    K Profile picture for K18Hair
    K18Hair
    Yesterday

    Martha, we're absolutely thrilled to hear that HeatBounce is perfect for your thin hair! It's amazing that you're experiencing all the protection and conditioning benefits without any of that heavy, greasy feeling.

  • Amanda A.
    Verified Reviewer
    Reviewing
    HeatBounce conditioning heat protectant 4oz
    I recommend this product
    Age 35 - 44
    Hair Concern Heat damage, Frizz, Fragile/brittle hair, Dryness
    Hair Type Curly/Coily, Thick/Coarse
    My Results Soft Touchable Hair, Smoother Hair, Visible Difference, Bouncy Hair
    Rated 5 out of 5 stars
    1 week ago
    Awesome!

    *I was gifted this product from K18 to review. My opinions are my own*

    My thick curly hair can sometimes be an issue for me personally to manage daily. So, I prefer to straighten my hair to better maintain it. Products I've used in the past never gave me the results I was hoping to achieve. It was always disappointing for me. This heat protectant spray from K18 has been amazing for my hair so far. My hair feels soft and it has a nice, lightweight bounce to it. It gives my hair moisture and it's easy to run my fingers through. The great protection I get from this, when using my flat iron, is something that I haven't experienced from previous products. The product also smells great and the texture makes it very easy to apply to my hair each time. I definitely recommend

    K Profile picture for K18Hair
    K18Hair
    1 week ago

    It's wonderful that you're finally getting the results you've been hoping for - the soft feel, lightweight bounce, and moisture are exactly what we love to hear about. Thank you for sharing your honest review and for recommending it to others!

  • Jennifer N. H.
    Reviewing
    HeatBounce conditioning heat protectant 4oz
    I recommend this product
    Age 45 - 54
    Hair Concern Frizz, Extending time between washes, Split-Ends, Heat damage
    Hair Type Curly/Coily
    My Results Less Frizz, Bouncy Hair, Visible Difference, Defined Curl/Wave Pattern, Soft Touchable Hair
    Rated 5 out of 5 stars
    1 week ago
    Love it

    I was gifted by the brand, I’m absolutely loving the new K18 Heatbounce conditioning heat protectant! It’s smells so good and works awesome! No frizz and no heat damage so definitely It’s a YES for me my hair has no frizz! I’m love this stuff, my hair has never been this soft and looks so good!

    K Profile picture for K18Hair
    K18Hair
    1 week ago

    We're so thrilled to hear how much you're loving HeatBounce, Jennifer! It sounds like it's delivering everything we designed it for - amazing scent, frizz control, heat protection, and that incredible softness. Thank you for sharing your wonderful experience with us!

  • Pam
    Verified Reviewer
    Reviewing
    HeatBounce conditioning heat protectant 4oz
    I recommend this product
    Age 35 - 44
    Hair Concern Color-care, Dryness, Frizz, Fragile/brittle hair
    Hair Type Fine/Thin, Curly/Coily
    My Results Less Breakage, Soft Touchable Hair, Stronger Hair, Visible Difference
    Rated 5 out of 5 stars
    1 week ago
    Helps protect already damaged hair

    I’ve never before used a K18 Biomimetic Hairscience product and now I see why it’s been talked about so much recently. This brand truly uses better ingredients to help protect your hair from damage. I don’t tend to straighten my hair very often. I have damaged and thinning hair. I used the K18 Heat Bounce Heat Protectant Spray and it truly helped to protect my damaged hair. Receiving this product to use has been a life saver for me. I sprayed it on my wet hair and brushed it through to the ends. Then I carefully took my time using a hair straightener. I’m so used to hair breaking while straightening that I tend to avoid it. But when I applied this product it helped save my hair and kept it hydrated while straightening it. I’ve been so excited that I plan on straightening my hair more often now. Gifted by K18 Biomimetic Hairscience

    K Profile picture for K18Hair
    K18Hair
    1 week ago

    We’re so happy to hear your first K18 experience has been such a positive one, Pam! Knowing Heat Bounce helped protect and hydrate your hair while straightening, especially with already damaged strands means the world to us. Thank you for sharing your results, and we can’t wait for you to enjoy even more good hair days with K18!

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