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4.8
Rated 4.8 out of 5 stars
339 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 with 3 sprays, increasing as needed, depending on your hair type.

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.
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See how K18 unlocks our community's expression
4.8
Rated 4.8 out of 5 stars
Based on 339 reviews
339 reviews
  • David B.
    Verified Reviewer
    Reviewing
    HeatBounce conditioning heat protectant 4oz
    I recommend this product
    Age 45 - 54
    Hair Concern Chemical damage, Heat damage, Color-care, Dryness
    Hair Type Medium Density, Straight/Wavy
    My Results Visible Difference, Stronger Hair, Smoother Hair, Shinier Hair, Soft Touchable Hair
    Rated 5 out of 5 stars
    9 hours ago
    Fabulous heat protectant

    Gifted by K18 in exchange for my honest review. As someone damaged hair that has been highlighted, I find it quite important to use a solid heat protectant. So I was pretty excited to try the new HeatBounce conditioning heat protectant. This lightweight, leave-in spray doesn't only provide fantastic heat protection, it also detangles my hair easily and leaves it looking and feeling hydrated, soft and shiny. The product itself comes out in a fine mist and is easy to incredibly easy to apply to towel dried hair. I love how healthy and shiny my hair looks every time I use this product prior to drying and styling my hair.

  • Marsh
    Verified Reviewer
    Reviewing
    HeatBounce conditioning heat protectant 4oz
    I recommend this product
    Age 35 - 44
    Hair Concern Heat damage, Frizz, Dryness, Extending time between washes
    Hair Type Fine/Thin
    My Results Less Frizz, Defined Curl/Wave Pattern, Soft Touchable Hair, Visible Difference
    Rated 5 out of 5 stars
    Yesterday
    Love this!

    Complimentary from K18 Biomimetic Science. Love using this as a leave in conditioner even without using heat tools. I feel like it helps protect my hair from the summer heat. Controls frizz and smells good!

    K Profile picture for K18Hair
    K18Hair
    Yesterday

    Thank you for your feedback, Marsh! It’s great that it helps protect your hair from summer heat, controls frizz, and has a pleasant scent. Appreciate you sharing your experience!

  • Pol
    Reviewing
    HeatBounce conditioning heat protectant 4oz
    I recommend this product
    Age 25 - 34
    Hair Concern Heat damage, Color-care
    Hair Type Fine/Thin
    My Results Bouncy Hair, Less Frizz, Less Breakage, Smoother Hair, Shinier Hair
    Rated 5 out of 5 stars
    2 days ago
    Soft hair!!

    Gifted by K18 Biomimetic Hairscience. This leave-in conditioner is amazing! It makes my hair feel soft, smooth, and tangle-free while protecting it from heat up to 450°F. The lightweight formula doesn’t weigh my hair down, and I’ve noticed way less breakage after blow-drying.

    K Profile picture for K18Hair
    K18Hair
    Yesterday

    Thank you for your thoughtful review, Pol! We’re thrilled to hear the leave-in conditioner is keeping your hair soft, smooth, and protected, without weighing it down. It’s wonderful that you’re seeing less breakage too, exactly what we aim for! We appreciate you sharing your experience.

  • Mariah M.
    Verified Reviewer
    Reviewing
    HeatBounce conditioning heat protectant 4oz
    I recommend this product
    Age 35 - 44
    Hair Concern Heat damage, Color-care, Split-Ends, Fragile/brittle hair, Frizz
    Hair Type Medium Density, Curly/Coily
    My Results Smoother Hair, Soft Touchable Hair, Cleaner, fresher hair, Visible Difference, Stronger Hair
    Rated 5 out of 5 stars
    2 days ago
    Blowout Bestie

    Prepped my blowout with the K18 Heat Bounce before going into a protective style, and I’m hooked! It smells so good and the product is lightweight yet conditioning. The next morning, my hair felt so soft. This is a wash day staple.

    Gifted by k18biomimetichairscience

    K Profile picture for K18Hair
    K18Hair
    Yesterday

    Thank you for sharing your experience, Mariah! We’re so glad HeatBounce prepped your hair perfectly for your protective style and left it feeling soft the next day. The lightweight, conditioning formula and scent are definitely fan favorites. We appreciate you making it a wash day staple!

  • Kimberley
    Verified Reviewer
    Reviewing
    HeatBounce conditioning heat protectant 4oz
    I recommend this product
    Age 25 - 34
    Hair Concern Heat damage, Frizz, Dryness, Split-Ends, Fragile/brittle hair
    Hair Type Thick/Coarse, Curly/Coily
    Rated 5 out of 5 stars
    4 days ago
    Very hydrating

    I have 4b/4c hair and use heat on my hair every now and then. This leave in conditioner spray was very lightweight and sprayed as a mist. It has a nice aroma. It was very hydrating and made my hair feel soft. I also like that it provided heat protection. Complimentary from k18biomimetichairscience

    K Profile picture for K18Hair
    K18Hair
    Yesterday

    Thank you for your wonderful review, Kimberley! We're so happy to hear that HeatBounce worked perfectly for your 4b/4c hair.

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