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.
still have questions? visit our help center
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
- Malgorzata P.Verified BuyerReviewingHeatBounce Deluxe sampleI recommend this productRated 5 out of 5 stars21 hours agoLove
One of my favourite products
KUK18Hair UK20 hours agoWe love hearing this! 💚 So happy HeatBounce Deluxe is one of your favorites. Thank you for making K18 part of your routine! ✨
- Rebecca F.Verified BuyerReviewingHeatBounce Deluxe sampleI recommend this productRated 5 out of 5 starsYesterdaya sizing
run don’t walk and buy it!!!
KUK18Hair UK10 minutes agoHi Rebecca, thank you so much for the amazing review! We're thrilled you're loving the HeatBounce Deluxe sample and we really appreciate you taking the time to share your experience with us. 💗
- Christyal P.Verified BuyerReviewingHeatBounce conditioning heat protectant 118 mLI recommend this productAge 35 - 44Hair Concern Fragile/brittle hair, Split-EndsHair Type Medium DensityMy Results Visible Difference, Less BreakageRated 5 out of 5 stars2 days agoLove this
Absolutely love this stuff
KUK18Hair UK2 days agoWe're so happy you're loving the HeatBounce! 💚 Thank you for the amazing review and for being part of the K18 community!
- katerina M.Verified BuyerReviewingHeatBounce conditioning heat protectant 118 mLI recommend this productAge 35 - 44Hair Concern Frizz, Dryness, Fragile/brittle hairHair Type Fine/Thin, Curly/CoilyMy Results Less Frizz, Less Breakage, Defined Curl/Wave Pattern, Soft Touchable HairRated 5 out of 5 stars2 days agoGreat living
It provides excellent hydration; it’s a great fit for my dry, wavy hair.
KUK18Hair UK2 days agoWe're so happy HeatBounce is working beautifully for your dry, wavy hair! 💚 Thanks for sharing your experience and for being part of the K18 community!
- CustomerVerified BuyerReviewingHeatBounce conditioning heat protectant 118 mLI recommend this productRated 5 out of 5 stars3 days agoGreat Heat Protectant!
I really like HeatBounce! It's a great addition to my hair care routine, and I love that it provides heat protection while also conditioning my hair. I'm very happy with it and would definitely recommend giving it a try!
KUK18Hair UK2 days agoWe're so happy you're loving HeatBounce! 💚 Thanks for sharing the love and for being part of the K18 community. We appreciate your support!