
K18 HeatBounce Conditioning Heat Protectant
Biotech heat protectant that shields from cuticle to cortex
A leave-in conditioning spray powered by K18's resilicore™ technology — inspired by resilin, a natural protein that can withstand extreme temperatures. Unlike conventional heat protectants that only coat the cuticle surface, resilicore™ penetrates into the cortex where heat damage actually originates, providing protection up to 232°C and 85% less breakage after blow-drying. Contains K18PEPTIDE™ alongside sunflower, rosemary, and rice bran extracts. Contains a small amount of Isopropyl Alcohol near the end of the ingredient list — placing it in cgm_modified territory for strict CGM followers, though the curl community broadly accepts it for diffusing. Apply to damp hair before blow-drying or diffusing; re-apply to dry hair before hot tools.
Who is this for?
Our assessment — not the brand's claim
Curl pattern
Suits 2A through 4C.
Porosity
Suits Low through High.
Free from
Ingredients at a glance
A conditionally essential amino acid that strengthens the hair shaft by contributing to keratin structure. Also acts as a mild humectant.
Anything your hair can't have?
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