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
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- Rowena F.Verified BuyerReviewingHeatBounce 47 mLI recommend this productRated 5 out of 5 stars4 weeks agoAmazing Hair
Wow what can I say my hair must be someone else’s
It doesn’t not Frizz when dying it’s fantastic
KUK18Hair UK4 weeks agoThank you for your amazing review, Rowena! We're absolutely thrilled to hear that HeatBounce has transformed your hair so dramatically - it's incredible that it feels like someone else's hair! We love that you're experiencing zero frizz when drying, that's exactly the kind of game-changing results we aim for. Thank you for choosing K18 and for sharing your fantastic experience with us! ✨
- Colleen B.Verified BuyerReviewingHeatBounce conditioning heat protectant 118 mLI recommend this productRated 5 out of 5 stars1 month agoThe Best!
This heat protection is like no other leaves your hair super soft aswel as protecting my hair from my heat tools. My hair feels smoother and frizz free.
KUK18Hair UK1 month agoThank you for your amazing review, Colleen! 💛 We're thrilled to hear that HeatBounce is delivering the ultimate protection while leaving your hair super soft and frizz-free. It sounds like it's become the perfect addition to your styling routine! Thank you for choosing K18 and for sharing your experience with us. ✨😊
- Bobbie S.Verified BuyerReviewingHeatBounce Deluxe sampleI recommend this productRated 5 out of 5 stars1 month agoLeaves hair smooth
I love this product it works so good leaves my hair smooth
KUK18Hair UK1 month agoThank you so much for this amazing review, Bobbie! We're absolutely thrilled to hear that you love the HeatBounce Deluxe sample and that it's leaving your hair so smooth! It's wonderful that you're experiencing such fantastic results with the product - that's exactly what we love to hear! We're so excited that you're loving how it works and thanks for your incredible 5-star review! 💛
- Christy H.Verified BuyerReviewingHeatBounce conditioning heat protectant 118 mLI recommend this productAge 35 - 44Hair Concern Chemical damage, Heat damage, Color-care, Dryness, Fragile/brittle hairHair Type Fine/ThinMy Results Visible Difference, Stronger Hair, Smoother Hair, Shinier Hair, Cleaner, fresher hairRated 5 out of 5 stars2 months agoGreat heat protectant
I use this now after every wash to protect before styling. Works wonders and I can tell it is protecting my hair because my hair strength is improving.
KUK18Hair UK2 months agoThank you so much for this amazing review, Christy! We're absolutely thrilled to hear that you love the HeatBounce conditioning heat protectant and that you're using it after every wash! It's wonderful that you can feel it protecting your hair and that your hair strength is actually improving - that's exactly what we love to hear about our heat protection! We're so excited that you're experiencing such fantastic results and thanks for your incredible 5-star review! 💛
- Deyanirys S.Verified BuyerReviewingHeatBounce conditioning heat protectant 118 mLI recommend this productAge 45 - 54Hair Concern Fragile/brittle hair, Color-care, Heat damageHair Type Fine/Thin, Grey HairMy Results Stronger Hair, Less Breakage, Shinier Hair, Smoother Hair, Less FrizzRated 5 out of 5 stars2 months agoA miracle
Best product there is to dry your hair. Either by blow drying or curling iron. Simply the best.
KUK18Hair UK2 months agoThank you so much for this incredible review, Deyanirys! 💛 We're absolutely thrilled to hear that you think the HeatBounce conditioning heat protectant is a miracle - that's such an amazing compliment! It's wonderful that it's working so beautifully for you whether you're blow drying or using a curling iron, and we love that you consider it simply the best! We're so excited that you're loving the product and thanks for your fantastic 5-star review!