HeatBounce 47 mL

£24

4.8

Rated 4.8 out of 5 stars

661 Reviews

mini HeatBounce conditioning heat protectant

Name: HeatBounce 47 mL
Brand: K18Hair
SKU: K18-35093
Price: 24.00 GBP
Availability: InStock
Rating: 4.84 (661 reviews)

Take the future of heat protection to go

Mini Size - 47 mL£24.00 Full Size - 118 mL£48.00

£24

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description

A discovery-sized version of our leave-in conditioning heat protectant detangles, softens, and delivers deeper heat protection than ever before*—for 85% less breakage after blow drying*.

*k18hair.co.uk/disclaimers

- How to use
  Apply throughout sectioned hair, brushing through to help with even distribution. Less is more. Start small and build as needed. Hair should feel soft and tangle-free, but not coated.
  Use on towel-dried hair before blow drying and on dry hair before hot tools
- More to know
  
  resilicore™ heat-shielding technology is inspired by proteins in nature that can withstand extreme temperatures. Unlike traditional heat protectants that only coat the cuticle, the size + molecular makeup of resilicore™ allows it to penetrate deeper than ever before*, into hair's inner cortex where heat damage can occur, forming a protective shield that fortifies from within.
  
  Conditioning blend conditions, softens, and detangles even damaged hair
  Created for all hair types + textures. Can be used on extensions.
- Key benefits
  
  Protects from heat up to 232°C
  
  85% less breakage after blow drying⁷
  
  Lightweight formula conditions, softens, and detangles even damaged hair
  
  *Heat protection observed on hair in clinical testing after application of HeatBounce and use of 450℉ (232℃) flat iron on dry hair. 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.
  ³Results observed as a reduction in color change in scientific testing after application of HeatBounce on dry hair and use of 450℉ (232℃) flat iron.
  ⁴Results observed as a reduction in hair breakage in scientific testing after application of HeatBounce on dry hair and use of 450℉ (232℃) flat iron.
  ⁵Results observed as a reduction in hair breakage in scientific testing after application of HeatBounce on dry hair and use of 450℉ (232℃) flat iron.
  ⁶Results observed as an increase in protein stability in scientific testing after repeated exposure to UV and HeatBounce application.
  
  ⁷Reduction in hair breakage observed in clinical testing after application of high heat blow dry on wet hair.
- Ingredients
  
  Water (Aqua) (Eau), Cellulose Gum, Isopentyldiol, Propanediol , Cetearyl Alcohol, Isopropyl palmitate, Sodium Benzoate, C13-15 alkane, sh-Oligopeptide-78 s-Fruit Fly Oligopeptide-1, (sh-Oligopeptide-78 s-Fruit Fly Oligopeptide-1) Peptides, Laurdimonium Hydroxypropyl Hydrolyzed Barley Protein, Helianthus Annus (Sunflower) Seed Oil , Oryza Sativa (Rice) Bran Extract, Helianthus Annuus (Sunflower) Extract, Rosmarinus Officinalis (Rosemary) Leaf Extract, Tocopherol, Behentrimonium Chloride, Brassicatrimonium Chloride, Gluconolactone, Arginine, Coco-Glucoside, Lactic Acid, Cellulose, C12-20 Alkyl Glucoside, Citric acid , Potassium Sorbate, Benzyl Alcohol, Isopropyl Alcohol, C14-22 Alcohols, Fragrance (Parfum), Amyl Salicylate, Benzyl Salicylate, Citronellol, Citrus Aurantium Peel Oil, Dimethyl Phenethyl Acetate, Geraniol, Geranyl Acetate, Isoeugenyl Acetate, Limonene, Linalool, Linalyl Acetate, Pinene, Tetramethyl Acetyloctahydronaphthalenes, Vanillin.

pairs well with

mini leave-in molecular repair hair mask

mini AirWash™ dry shampoo

got questions?

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.

the future of heat protection

85%

less breakage after blow drying⁷

450

degree heat protection from cuticle¹ to cortex²

Powered by resilicore™

Inspired by proteins in nature that can withstand extreme temperatures.

Explore the Science

heat protect + condition in one step

how to use HeatBounce

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.

learn more on our blog

August 08, 2025 / products

how to use HeatBounce conditioning heat protectant

Blow dry, curl + straighten your hair—without damage.

July 31, 2025 / products

Meet HeatBounce: Deeper Heat Protection Than Ever Before*

Powered by new patented heat-shielding tech.

July 17, 2025 / products

What Hot Tools Are Really Doing to Your Hair

If your routine involves heat—this one's for you.

feel what's possible with K18

See how K18 unlocks our community's expression

4.8

Rated 4.8 out of 5 stars

Based on 661 reviews

98%would recommend these products

Reviews Summary

Customers say this heat protectant leaves hair feeling soft, smooth, and shiny after styling with hot tools. Many appreciate its lightweight texture that doesn't weigh hair down or leave residue. Users frequently mention the pleasant fragrance and how the product helps reduce frizz and breakage. Common feedback includes improved hair manageability and less damage from heat styling. Several customers note it works well as both a detangler and conditioning treatment. While most reviews are positive, a few users found it sticky or didn't see dramatic results. Many mention using it alongside other products in their routine for enhanced results.

Customers Talked About

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661 reviews

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Christyal P.
Verified Buyer
Reviewing
HeatBounce conditioning heat protectant 118 mL
I recommend this product
Age 35 - 44
Hair Concern Fragile/brittle hair, Split-Ends
Hair Type Medium Density
My Results Visible Difference, Less Breakage
Rated 5 out of 5 stars
1 hour ago
Love this
Absolutely love this stuff
Was this helpful?
KU
K18Hair UK
35 minutes ago
We'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 Buyer
Reviewing
HeatBounce conditioning heat protectant 118 mL
I recommend this product
Age 35 - 44
Hair Concern Frizz, Dryness, Fragile/brittle hair
Hair Type Fine/Thin, Curly/Coily
My Results Less Frizz, Less Breakage, Defined Curl/Wave Pattern, Soft Touchable Hair
Rated 5 out of 5 stars
8 hours ago
Great living
It provides excellent hydration; it’s a great fit for my dry, wavy hair.
Was this helpful?
KU
K18Hair UK
6 hours ago
We'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!
Customer
Verified Buyer
Reviewing
HeatBounce conditioning heat protectant 118 mL
I recommend this product
Rated 5 out of 5 stars
9 hours ago
Great 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!
Was this helpful?
KU
K18Hair UK
8 hours ago
We're so happy you're loving HeatBounce! 💚 Thanks for sharing the love and for being part of the K18 community. We appreciate your support!
Jon S.
Verified Buyer
Reviewing
HeatBounce Deluxe sample
I recommend this product
Rated 5 out of 5 stars
Yesterday
I like the protection
I see less dry ends and no more heat damage, made a difference.
Was this helpful?
KU
K18Hair UK
Yesterday
Thank you so much for your amazing 5-star review, Jon! We're thrilled to hear that HeatBounce Deluxe is protecting your hair and reducing dry ends. Your support means everything! 💙
MELANIE M.
Verified Buyer
Reviewing
HeatBounce Deluxe sample
I recommend this product
Rated 5 out of 5 stars
Yesterday
It works !
This is an amazing product , it made my damaged hair look and feel soft and looked great!
Was this helpful?
KU
K18Hair UK
Yesterday
Thank you so much for your amazing 5-star review, Melanie! 💖 We're thrilled that HeatBounce Deluxe made your damaged hair feel soft and look great. Thank you for your support! ✨

*Disclaimers