Schwarzkopf BC Bonacure Color Freeze Shine Savior is a leave-in serum for color-treated hair that detangles and provides heat protection when blow-drying. It is free of silicones and artificial colors. This serum restores hair to its ideal pH value of 4.5 to lock in color pigments deep within the hair structure to prevent color fading. Schwarzkopf BC Bonacure Shine Savior contains vegan keratin and Cell Equalizer Technology.How to use: 1. Apply an appropriate amount to smooth hair lengths and ends. 2. Leave on for at least 5 minutes. 3. Do not rinse.