K18 HeatBounce Conditioning Heat Protectant K18 HeatBounce Conditioning Heat Protectant is a lightweight leave-in heat protectant designed to defend hair from heat damage while conditioning and detangling. Powered by K18's patented resilicore heat-shielding technology, it protects from the hair's outer cuticle to the inner cortex and can be used before blow drying, straightening, curling, or other heat styling. Benefits Provides heat protection up to 450 F for blow drying and hot-tool styling. Uses patented resilicore heat-shielding technology to help protect from the cuticle to the cortex, where heat damage can occur. Clinically tested to deliver 85% less breakage after high-heat blow drying. Lightweight conditioning blend helps soften and detangle even damaged hair. Helps maintain hair color and vibrancy during heat styling. Leaves hair feeling smooth and manageable without a heavy or coated finish when used as directed. Suitable for all hair types and textures. Can be used on human hair extensions. Works on towel-dried hair before blow drying and dry hair before hot tools. No activation or waiting time is required before heat styling. How to Use Section the hair and apply K18 HeatBounce Conditioning Heat Protectant evenly throughout. Start with a small amount and add more as needed. Hair should feel soft and detangled, not coated. Brush through the hair to distribute the product evenly. Apply to towel-dried hair before blow drying. Reapply to dry hair before using a flat iron, curling iron, or other hot tools. Style immediately; no waiting or heat-activation period is required.