K18 HeatBounce Conditioning Heat Protectant 118ml
K18 HeatBounce Conditioning Heat Protectant is a revolutionary leave-in treatment that does more than just coat the surface. Powered by Resilicore™ technology, it penetrates deep into the hair's inner cortex to form a protective shield that fortifies from within. Clinically proven to reduce breakage by 85% after blow-drying, this conditioning blend detangles and softens even severely damaged hair. It provides advanced protection against extreme styling temperatures while leaving hair feeling weightless, smooth, and resilient.
4-minute leave-in treatment to reverse hair damage
- K18PEPTIDE™ is a biotech-developed peptide that mimics hair's structure to reverse damage by reconnecting polypeptide chains and disulfide bonds broken during bleaching, color and chemical services + heat.
- pH-optimized (5.0-6.0): Helps minimize cuticle swelling + put hair proteins in their most resilient state
- Cream format: Enables easy, lightweight application across all hair types, with detangling and softening benefits
Vegan, color-safe, cruelty-free
- Shampoo with K18 Damage Shield PH Protective Shampoo or K18 Peptide Prep™ Detox Shampoo, do not condition. Towel-dry thoroughly
- Apply 3-9 pumps of K18 Leave-In Molecular Repair Mask based on your length and density, starting at the ends and working up towards the roots
- Let sit for 4 minutes. Do not rinse out.
- Comb, add product + style as usual. Use for consecutively for 4-6 washes post-salon service, then as needed
Complete Your Routine
Frequently Asked Questions
K18 HeatBounce™ is a multi-tasking 2-in-1 leave-in conditioning mist and heat protectant. It shields hair from thermal damage up to 232°C (450°F), detangles, softens, and reduces breakage by up to 85% after blow-drying.
Unlike traditional heat protectants that only coat the surface of the hair, patent-pending Resilicore™ technology penetrates deep into the inner hair cortex. Inspired by temperature-resilient natural proteins, it builds an internal shield that fortifies strands from within against extreme heat, preventing inner fiber degradation without leaving a stiff or heavy coating.
It is suitable for all hair types, textures, and color-treated hair—especially damaged, high-porosity, or fragile hair prone to snapping during heat styling. It is also safe and effective for use on hair extensions.
On Damp Hair: Mist evenly onto towel-dried hair before blow-drying. Brush or comb through to ensure uniform distribution.
On Dry Hair: Lightly mist through sections prior to using hot tools like flat irons or curling wands.
Tip: Less is more—start with a light application and build as needed.
No. HeatBounce™ is an ultra-lightweight mist formulated to condition and add slip without leaving stiff, crunchy, or greasy buildup. Hair retains natural movement, softness, and volume.
Yes. In addition to thermal defense up to 232°C, HeatBounce™ contains UV filters to help protect hair against environmental aggressors, UVA/UVB exposure, and color dullness.
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