K18 Biomimetic Hairscience Mini HeatBounce Leave-In Conditioner – 1.6 oz
K18 HeatBounce is a lightweight leave-in conditioning heat protectant powered by patented resilicore™ heat-shielding technology that penetrates from cuticle to cortex, delivering 85% less breakage after blow drying and protection up to 450°F. It detangles, softens, and shields all hair types from UV, heat damage, color fade, and frizz.
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- Powered by patented resilicore™ heat-shielding technology — protects from cuticle to cortex up to 450°F
- 85% less breakage after blow drying vs. untreated hair (per clinical testing)
- Lightweight leave-in formula conditions, softens, and detangles without buildup or weighing hair down
- Defends against heat damage, UV exposure, color fade, dullness, and frizz
- Suitable for all hair textures: straight, wavy, curly, and coily; fine, medium, and thick
- No activation time needed — apply and heat style immediately
- Discovery/travel size: 1.6 oz / 47 mL
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
- Apply after shampooing and conditioning (or after the K18 leave-in molecular repair mask).
- Distribute evenly throughout sectioned, towel-dried hair and brush through for even coverage.
- Start with a small amount and build as needed — hair should feel soft and tangle-free, not coated.
- Use on towel-dried hair before blow drying or diffusing; apply on dry hair before flat iron or curling iron.
- Style immediately — no wait time required before applying heat.
- Reapply before hot tools each time you switch between blow dryer and styling tools.
Free U.S. shipping on orders over $20 — $4.95 flat rate under $20 (USPS Ground Advantage, 2–5 business days). Orders placed before 2:00 PM PT ship the same day.
Unopened, sealed items may be returned within 30 days of delivery. See our Shipping Policy and Refund Policy for full details.
- Free U.S. shipping on orders over $20
- Same-day shipping on orders before 2:00 PM PT
