Home / K18 HeatBounce Conditioning Heat Protectant
  • K18 HeatBounce Conditioning Heat Protectant 118ml Spray
  • K18 HeatBounce Conditioning Heat Protectant Before & After
  • K18 HeatBounce Conditioning Heat Protectant Key Benefits
  • K18 HeatBounce Conditioning Heat Protectant 118ml
  • K18 HeatBounce Conditioning Heat Protectant Infographic
  • K18 HeatBounce Conditioning Heat Protectant & K18 Leave in molecular hair mask
  • K18 HeatBounce Conditioning Heat Protectant in hair
  • How does K18 HeatBounce Conditioning Heat Protectant work
  • K18 HeatBounce Conditioning Heat Protectant 47ml
1 8

K18

K18 HeatBounce Conditioning Heat Protectant

K18 HeatBounce Conditioning Heat Protectant
€ 39.20
€ 49.00 € 39.20
Sold out

Save € 9.80 - 20% Off

K18 HeatBounce Conditioning Heat Protectant
K18 HeatBounce Conditioning Heat Protectant
€ 39.20 € 49.00

K18 HeatBounce Conditioning Heat Protectant is a lightweight leave-in spray that detangles, softens, and protects against heat up to 232°C. With advanced Resilicore™ technology, this K18 heat protectant penetrates deep into the hair cortex for 85% less breakage after blow-drying. Suitable for all hair types and textures, including extensions.

Why you need it

K18 HeatBounce Conditioning Heat Protectant isn’t your average heat spray, it’s a breakthrough in damage prevention. Using Resilicore™ heat-shielding technology, inspired by proteins found in nature that can endure extreme heat, the K18 HeatBounce goes deeper than traditional heat protectants. Instead of sitting on the surface, K18 penetrates the inner cortex where heat damage starts, building a protective shield from within. Hair feels softer, smoother, and more manageable while staying strong against the daily stress of styling. Whether you’re blow drying, curling, or straightening, you’ll get conditioned, detangled hair with 85% less breakage and lasting protection. Plus, the K18 heat protectant is lightweight enough for every hair type and even safe for extensions.

how to use
Apply to towel-dried hair before blow-drying. Work through sectioned hair and brush for even distribution. Use on dry hair before styling with hot tools.

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) PEPTIDES, LAURDIMONIUM HYDROXYPROPYL HYDROLYZED BARLEY PROTEIN, HELIANTHUS ANNUUS (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.

Faq's
Q: What heat level does K18 HeatBounce Conditioning Heat Protectant protect against?
A: It protects hair from heat up to 232°C, making it ideal for blowdrying, straightening, and curling.

Q: Can I use K18 HeatBounce Conditioning Heat Protectant on extensions?
A: Yes, this formula is safe for use on extensions as well as all hair types and textures.

Q: How is K18 HeatBounce different from other heat protectants?
A: Unlike traditional formulas that only coat the cuticle, K18 HeatBounce uses Resilicore™ technology to penetrate the hair’s inner cortex, where heat damage starts, for deeper protection and up to 85% less breakage after blow drying.

Q: Does K18 HeatBounce leave hair feeling heavy?
A: No, the lightweight formula conditions, softens, and detangles without weighing hair down, even on fine textures.

About the Brand

K18 is the hair repair brand that changed the game. Its patented K18Peptide works inside the hair to repair damage from bleach, colour and heat. Our bestseller is the K18 Leave-in Molecular Repair Hair Mask, used in just four minutes after shampooing with no rinse. Fans also love the K18 Airwash Dry Shampoo, Molecular Repair Hair Oil and Peptide Prep Detox Shampoo.

SHIPPING & RETURNS

Ireland Tracked Delivery

Delivery 1-2 Working Days
Delivered Mon - Fri
Tracked
Free on orders over €50.00

Ireland Next Day Delivery

Orders placed before 3pm
Tracked
SMS & Email Updates
Delivery Next working day Monday to Friday excl Bank Holidays

Full delivery information · Returns policy

View full details arrow

More from K18

You may also like

  • 5 stars: 2 (100%)
  • 4 stars: 0 (0%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
V
Valerie
Very quick

Very quick delivery

A
Anonymous
The missing puzzle piece

This product helped my hair get back to its original softness. Since I have been using at home semi-permanent dye in the same colour my original hair colour is (dark medium brown) my hair has never felt the same despite all the protective products and treatments. Heat Bounce made my hair feel soft to touch.