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
- April A.Verified BuyerReviewingHeatBounce conditioning heat protectant 4ozI recommend this productAge 35 - 44Hair Concern Chemical damage, Heat damage, Fragile/brittle hair, Split-EndsHair Type Fine/Thin, Straight/WavyMy Results Visible Difference, Smoother Hair, Soft Touchable HairRated 4 out of 5 stars18 hours agoPretty good
It seems to work but can be a little heavy if I use just a little too much. It could use a different type of spray mechanism for better, more even distribution.
KK18Hair17 hours agoHi April,
Thank you so much for taking the time to share your feedback on HeatBounce conditioning heat protectant! We really appreciate your honest thoughts on the spray mechanism and application. Your feedback is valuable to us.
- Marnie L. B.Verified BuyerReviewingHeatBounce conditioning heat protectant 4ozI recommend this productAge 55 - 64Hair Concern Heat damage, Color-care, Frizz, Dryness, Split-EndsHair Type Fine/ThinMy Results Less Frizz, Bouncy Hair, Visible Difference, Less Breakage, Soft Touchable HairRated 5 out of 5 stars21 hours agoLove it!
Best detagler I've ever used. Make your hair super soft and the comb or brush can easy go through.
KK18Hair20 hours agoThank you so much for your amazing review! 💙 We're thrilled to hear that HeatBounce is working so well as a detangler and leaving your hair feeling super soft. We appreciate your support!
- Patricia Z.Verified BuyerReviewingHeatBounce 1.6 ozI recommend this productAge 65+Hair Concern Color-care, Frizz, Heat damageHair Type Fine/Thin, Straight/WavyMy Results Less Frizz, Bouncy Hair, Smoother Hair, Shinier Hair, Soft Touchable HairRated 5 out of 5 stars2 days agoSoft but body remains
I wanted a heat protectant that was not a heavy gel or cream because my hair is fine and as I'm getting older it is thinning some. The Heatbounce worked great for me, it gave me the heat protection I needed without that heavy feel and the body remained in my hair. Gels and creams seem to make my scalp itch a bit also so I was glad this spray is so light and it was the only conditioner I used which is also a plus.
KK18Hair2 days agoThank you so much for your amazing review, Patricia! 💙 We're thrilled HeatBounce gives you the heat protection you need without that heavy feel. We love that it works perfectly for your fine hair! ✨
- Martha F.Verified BuyerReviewingHeatBounce conditioning heat protectant 4ozI recommend this productAge 55 - 64Hair Concern Color-careHair Type Fine/ThinMy Results Visible Difference, Less Frizz, Less Breakage, Smoother HairRated 5 out of 5 stars3 days agoHeat protectant
This has been great for my hair. All of the K18 products have made a huge improvement in my hair.
KK18Hair3 days agoThank you so much for your amazing review! 💙 We're thrilled that HeatBounce and our K18 collection are making such a difference for your hair. Thank you for the love! ✨
- Vanessa C.Verified BuyerReviewingHeatBounce 1.6 ozI recommend this productAge 35 - 44Hair Concern Chemical damage, Heat damage, Frizz, Fragile/brittle hair, Oily hair/scalpHair Type Fine/Thin, Straight/WavyMy Results Less Frizz, Visible Difference, Soft Touchable Hair, Shinier Hair, Smoother HairRated 5 out of 5 stars2 weeks agoGreat 🩷💜🩵
I love the way this product makes my hair feel!!
It protects my hair from heat and styling and doesn’t make it look greasy like a lot of other brands and high dollar products.
KK18Hair2 weeks agoThank you so much for the awesome review! 🔥💕 We're thrilled to hear you're loving how HeatBounce protects your hair without the greasy feel! ✨