K18 HeatBounce Conditioning Heat Protectant

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

Free From

How to Use

Apply throughout sectioned, damp hair and brush through for even distribution. Use before blow-drying or diffusing. Re-apply to dry hair before straighteners or curling irons — no wait needed before applying heat. For best results when diffusing, apply after the K18 mask and before styling products.