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
- Texture
- Fragrance
- Manageability
- Hair Feel
- Allison D.Verified BuyerReviewingHeatBounce conditioning heat protectant 4ozI recommend this productAge 45 - 54Hair Concern Heat damage, Color-care, Dryness, Fragile/brittle hair, FrizzHair Type Medium Density, Fine/ThinMy Results Less Frizz, Bouncy Hair, Visible Difference, Less Breakage, Stronger HairRated 5 out of 5 stars12 hours agoPossibly my favorite product!!
I use this on wet hair and before curling my hair. My curls stay all day and feels soft. I can’t live without this product!!
KK18Hair10 hours agoThank you so much for the love! 💙 We're thrilled to hear HeatBounce is your favorite and keeping your curls looking amazing all day long! ✨
- Alyssa K.Verified BuyerReviewingHeatBounce 1.6 ozI recommend this productAge 25 - 34Hair Concern Frizz, DrynessHair Type Straight/Wavy, Medium DensityMy Results Less Frizz, Visible Difference, Soft Touchable Hair, Shinier HairRated 5 out of 5 stars3 days agoThe best product ever
My hair has never felt so smooth and frizz free after blow drying with a round brush.
KK18Hair3 days agoThank you so much for the 5-star review! We're thrilled to hear you're loving the HeatBounce and the amazing results you're getting! 💙✨
- Jennifer B.Verified BuyerReviewingHeatBounce 1.6 ozI recommend this productAge 45 - 54Hair Concern Chemical damage, Heat damage, Frizz, Fragile/brittle hair, DrynessHair Type Fine/Thin, Grey HairMy Results Less Frizz, Visible Difference, Smoother HairRated 5 out of 5 stars1 week agoThe best heat protectant on the market.
This is some magic stuff. I’m a FitPro & this product holds my hair in place through multiple workouts & touch ups.
Before & after photos.
KK18Hair1 week agoThank you so much for the love! 💙 We're thrilled to hear HeatBounce is delivering the hold you need through your workouts! ✨
- Cara R.Verified BuyerReviewingHeatBounce conditioning heat protectant 4ozI recommend this productAge 35 - 44Hair Concern Heat damage, Fragile/brittle hair, Split-Ends, DrynessHair Type Thick/CoarseMy Results Visible Difference, Less Breakage, Smoother HairRated 5 out of 5 stars1 week agoAmazing
I love this spray! My friend recommended because I have been dealing with breakage and this and the leave in treatment is working great!
KK18Hair1 week agoThank you so much for the 5-star review, Cara! We're thrilled HeatBounce is working great for you! 💙 We appreciate your support! ✨
- Nicole E.Verified BuyerReviewingHeatBounce 1.6 ozI recommend this productAge 35 - 44Hair Concern Heat damage, Frizz, DrynessHair Type Straight/Wavy, Thick/Coarse, Fine/ThinMy Results Less Frizz, Visible Difference, Smoother Hair, Soft Touchable Hair, Cleaner, fresher hairRated 5 out of 5 stars1 week agoBest Heat Protectant
Purchased this on a whim and I do not regret it. My hair feels so soft and smooth after using this. I have bleached dry hair and I swear this adds life back into it. Doesn't hurt that it also smells great.
KK18Hair1 week agoThank you so much for the love! 💙 We're thrilled to hear you're loving HeatBounce and that it's bringing life back to your hair! ✨