HeatBounce conditioning heat protectant
The future of heat protection
This leave-in conditioning heat protectant detangles, softens, and delivers deeper heat protection than ever before*—for 85% less breakage after blow drying⁷.
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Is HeatBounce activated by heat?
No, HeatBounce does not need to be activated to protect from heat.
Do I have to wait to use heat after applying HeatBounce?
No, you can blow dry or use hot tools immediately after applying HeatBounce.
How is HeatBounce different from traditional heat protectants?
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.
*Heat protection observed on hair in clinical testing after application of HeatBounce and use of 450℉ (232℃) flat iron on dry hair
What’s the difference between molecular repair hair oil and HeatBounce?
While the molecular repair hair oil and HeatBounce have heat protection benefits, HeatBounce defends against heat from the cuticle¹ to the cortex², 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.
¹Results observed as a reduction in hair breakage in scientific testing after application of HeatBounce and use of 450℉ (232℃) flat iron on dry hair
²Results observed as an increase in protein stability in scientific testing after application of HeatBounce on damp hair and exposure to 450℉ (232℃) flat iron on dry hair.
When do I use HeatBounce in my routine?
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.
How often can I reapply HeatBounce?
Apply HeatBounce every time before you apply heat, including if you switch between blow drying to hot tools.
heat protect + condition in one step
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.
See how K18 unlocks our community's expression
- Protection
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- Fragrance
- Manageability
- Hair Feel
- Nancy K.Verified BuyerReviewingHeatBounce conditioning heat protectant 4ozI recommend this productAge 55 - 64Hair Concern Color-care, Extending time between washesHair Type Fine/ThinMy Results Visible Difference, Smoother Hair, Stronger Hair, Less Frizz, Soft Touchable HairRated 5 out of 5 stars3 days agoHeat protection = L-O-V-E
I've tried it and from the first application, my hair is restored, soft, and feels so healthy. A truly remarkable product for heat protection against heat blow drying. Your products are tremendous. But, I just wish they weren't so costly. Just saying.
KK18Hair3 days agoThank you so much for your wonderful review, Nancy! We're thrilled HeatBounce is delivering such amazing results for your hair. We truly appreciate your love and support! 🤍
- AlexandriaReviewingHeatBounce conditioning heat protectant 4ozRated 3 out of 5 stars5 days ago3 Stars
Left my hair greesy not my favorite and i love k18 was so dissatisfied and disappointed
KK18Hair11 hours agoWe’re so sorry to hear HeatBounce left your hair feeling greasy. 💕 We truly appreciate your love for K18 and would love the opportunity to make this right. Please reach out to our team so we can help troubleshoot and learn more about your experience.
- Jennifer M.Verified BuyerReviewingHeatBounce 1.6 ozI recommend this productAge 45 - 54Hair Concern Heat damage, Frizz, Fragile/brittle hairHair Type Medium DensityMy Results Less Frizz, Visible DifferenceRated 5 out of 5 stars5 days agoNEED
This is a great product. You don't need anything else. This is smoothing without being greasy looking.
KK18Hair5 days agoThank you so much for your review, Jennifer! We're thrilled to hear that HeatBounce is delivering the smooth results you love without the greasy look. We appreciate you being part of the K18 community! 🤍
- ashley e.Verified BuyerReviewingHeatBounce conditioning heat protectant 4ozI recommend this productAge 35 - 44Hair Concern Chemical damage, Heat damage, Color-care, Frizz, Fragile/brittle hairHair Type Fine/ThinMy Results Bouncy Hair, Less Frizz, Stronger HairRated 5 out of 5 stars1 week agoMy fave heat protectant
This is my favorite heat protectant spray. I feel like it does a great job, keeps my hair soft and smells great. The only downside is I feel like I go thru it faster than other products.
KK18Hair1 week agoThank you so much for your review! We're thrilled HeatBounce is your go-to heat protectant and that you're loving how it keeps your hair soft and smells amazing. We appreciate you being part of the K18 community! 🤍
- Haylee N.Verified BuyerReviewingHeatBounce conditioning heat protectant 4ozI recommend this productAge 35 - 44Hair Concern Frizz, Heat damage, DrynessHair Type Fine/ThinMy Results Less Frizz, Bouncy Hair, Visible Difference, Smoother Hair, Soft Touchable HairRated 5 out of 5 stars1 week agoHelps frizz
Protects my hair from frizz and damage, which is key with fine hair like mine. Love the scent!
KK18Hair1 week agoThank you so much for your review, Haylee! We're thrilled HeatBounce is protecting your fine hair from frizz and damage while keeping it smelling great. We appreciate you being part of the K18 community! 🤍