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
- Heat Protection
- Hair Texture
- Frizz Control
- Detangling
- Shine
- Hailey S.Verified BuyerReviewingHeatBounce 47 mLI recommend this productAge 25 - 34Hair Concern Heat damage, Chemical damage, Fragile/brittle hairHair Type Thick/CoarseMy Results Less Breakage, Shinier Hair, Smoother HairRated 4 out of 5 stars1 hour agoHeat bounce
My hair is forever thankful I have found this heat protectant!
KUK18Hair UK4 minutes agoThank you so much for the love! 💙 We're thrilled to hear your hair is loving HeatBounce! ✨
- Allison D.Verified BuyerReviewingHeatBounce conditioning heat protectant 118 mLI 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 stars2 days 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!!
KUK18Hair UK2 days 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! ✨
- Jennifer B.Verified BuyerReviewingHeatBounce 47 mLI 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.
KUK18Hair UK1 week agoThank you so much for the love! 💙 We're thrilled to hear HeatBounce is delivering the hold you need through your workouts! ✨
- Tiffany A.Verified BuyerReviewingHeatBounce Deluxe sampleI recommend this productRated 5 out of 5 stars1 week agoLeaves my hair soft and protected
I really like the K18 HeatBounce Conditioning Heat Protectant. It made my hair feel softer and smoother without weighing it down or leaving any sticky residue. My hair was easier to style and looked less frizzy after using heat. I also like having the added heat protection, especially since my hair is prone to dryness and breakage. I would definitely use this again.
KUK18Hair UK1 week agoThank you so much for the 5-star review, Tiffany! We're thrilled you're loving how HeatBounce Deluxe protects and softens your hair. 💙 We truly appreciate your support! ✨
- Christy J.Verified BuyerReviewingHeatBounce 47 mLI recommend this productAge 45 - 54Hair Concern Frizz, Fragile/brittle hair, Split-Ends, Heat damage, DrynessHair Type Fine/Thin, Grey Hair, Medium Density, Straight/Wavy, Thick/CoarseMy Results Less Frizz, Bouncy Hair, Less Breakage, Smoother Hair, Shinier HairRated 5 out of 5 stars2 weeks agoLet’s Bounce
This has been great for my clients who want volume but movement as well.
KUK18Hair UK2 weeks agoThank you so much for the love! 💙 We're thrilled to hear HeatBounce is delivering the volume and movement your clients are looking for! ✨