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tilenew | color:black
4.8
Rated 4.8 out of 5 stars
280 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. 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. 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 280 reviews
280 reviews
  • Rosa u.
    Verified Reviewer
    Reviewing
    HeatBounce conditioning heat protectant 4oz
    I recommend this product
    Age 25 - 34
    Hair Concern Color-care, Heat damage, Dryness, Frizz
    Hair Type Fine/Thin
    My Results Less Breakage, Bouncy Hair, Less Frizz, Stronger Hair, Visible Difference
    Rated 5 out of 5 stars
    10 hours ago
    The best heat protector

    I loved this K18 Conditioning heat protectant, I currently have colored hair, I also use the dryer, the flat iron to straighten my hair and this product has helped me protect my hair, and look healthier and more natural, I am, it is easy to use with the spray, I no longer have to use my hands, I am really delighted with every detail of this product, now I can use my straightener without fear of my hair looking dry and damaged, you will notice changes from the first use, my new ally for my new hair styles, highly recommended. Complimentary from k18biomimetichairscience

    K Profile picture for K18Hair
    K18Hair
    7 hours ago

    Thank you so much for this incredible review, Rosa! We're absolutely thrilled that Heat Bounce has become your new ally for styling and is helping protect your colored hair from heat damage.

  • Nisa
    Verified Reviewer
    Reviewing
    HeatBounce conditioning heat protectant 4oz
    I recommend this product
    Age 25 - 34
    Hair Concern Frizz, Chemical damage, Heat damage, Dryness
    Hair Type Straight/Wavy
    My Results Less Frizz, Bouncy Hair, Stronger Hair, Less Breakage, Smoother Hair
    Rated 5 out of 5 stars
    Yesterday
    Good stuff

    I really like how my hair feels after using the K18 Conditioning Heat Protectant. It’s super lightweight but still protects my hair really well when I use my straightener or blow dryer. I spray it on damp hair before styling, and it helps my hair stay smooth and soft without any sticky or heavy feeling. Since I started using it, my hair looks healthier and has less frizz. Plus, it feels stronger and doesn’t break as much when I brush it. It’s awesome because it protects my hair from heat damage but also helps repair it over time. Definitely one of my go to products for keeping my hair safe and looking good

    K Profile picture for K18Hair
    K18Hair
    12 hours ago

    Thank you so much for the thoughtful review! We're thrilled to hear it's helping keep your hair smooth, strong, and protected, exactly what it’s made to do.

  • Kathy
    Verified Reviewer
    Reviewing
    HeatBounce conditioning heat protectant 4oz
    I recommend this product
    Age 35 - 44
    Rated 5 out of 5 stars
    Yesterday
    Great one

    This leave in conditioner is amazing! It not only smells good, but makes your hair so soft, helps give it a nice shine and feel healthier! I was skeptical but this leave -in conditioner really tamed my gray hair frizzies in the first use. It was a bit of a beauty product miracle. I love using my flattening or curling iron after using this conditioner, makes my hair look professionally done.

    K Profile picture for K18Hair
    K18Hair
    Yesterday

    Thank you so much for your wonderful review! We’re thrilled to hear HeatBounce tamed your frizz and gave you soft, shiny, salon-quality results right from the first use. Your kind words mean a lot to us, thank you for sharing!

  • KIMBERLY
    Verified Reviewer
    Reviewing
    HeatBounce conditioning heat protectant 4oz
    I recommend this product
    Age 35 - 44
    Hair Concern Chemical damage, Heat damage, Frizz, Fragile/brittle hair, Dryness
    Hair Type Fine/Thin
    My Results Less Frizz, Defined Curl/Wave Pattern, Bouncy Hair, Shinier Hair
    Rated 5 out of 5 stars
    Yesterday
    Best protection from damage

    I was pleasantly surprised with this formula from K18. It made my hair ready for any hot tool product. My hair is protected and smells amazing. It's perfect at protecting from damage. I love the aroma. The spray has a great coverage and fine mist it settles perfectly. Great for beginners or experts. We all need to protect our hair from damage. Good for all hair types. It dispenses just the right amount of product without waste! My hair is soft and protected. I also see a great shine. I received this product for free for testing purposes.

    K Profile picture for K18Hair
    K18Hair
    Yesterday

    Thank you for your wonderful feedback! We're so glad to hear HeatBounce provided great protection, lovely scent, and perfect coverage for your hair. It’s fantastic to know it’s become a go-to for both beginners and experts alike. We appreciate you sharing your experience!

  • Stylingjay
    Verified Reviewer
    Reviewing
    HeatBounce conditioning heat protectant 4oz
    I recommend this product
    Age 35 - 44
    Hair Concern Chemical damage, Heat damage, Color-care, Frizz, Dryness
    Hair Type Thick/Coarse
    My Results Smoother Hair, Less Frizz, Shinier Hair, Soft Touchable Hair
    Rated 4 out of 5 stars
    Yesterday
    The scent is strong

    As someone who alternates between wearing their natural wavy hair and straightening it, I need a product to protect when I add heat. I used this by applying before I blow dried and again before using a flat iron. I sectioned my hair and applied a few sprays to each section and thought the pump worked well to distribute the product, which I then brushed through. When I was done styling, my hair was not weighed down or greasy at the roots. This left my hair looking shiny and feeling well conditioned. I did not care for the scent, which is a strong Rosemary and it lingers for some time. My hair did begin to frizz and become wavy in humid weather, so additional products for hold were needed to keep my style all day. I like that this protects up to 450* and keeps my hair looking and feeling healthy. I think this is a nice option for anyone who does not mind the scent of Rosemary in their hair. Gifted by K18

    K Profile picture for K18Hair
    K18Hair
    Yesterday

    Thank you for your detailed feedback! We’re glad HeatBounce provided the protection and conditioning you needed without weighing your hair down. We appreciate your honesty about the scent and styling hold, and your insights help us continue improving. Thanks for being part of the K18 community and sharing your experience!

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