K18 HeatBounce™ Leave-In Conditioner Heat Protectant
by K18 · hair_care
Editor's Take
K18 earns its treatment positioning here: the peptide sits where it matters, while silicone-free slip keeps heat styling light rather than lacquered.
Four-pillar formula scores
- Efficacy: 8.5 / 10
- Modern Tech: 8.8 / 10
- Clean Beauty: 7.8 / 10
- Sustainability: 8.7 / 10
The Verdict
The efficacy band is Exceptional, with sh-Oligopeptide-78 supporting repair and C13-15 Alkane providing lightweight thermal slip. The clean band is Good, though Parfum and disclosed fragrance allergens remain relevant for sensitive scalps. Technology is Highly Advanced, and the sustainability profile is Good, helped by the bio-based alkane approach. A credible premium pick for frequent blow-drying and flat-ironing.
Full INCI list
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