12-week protection against color fading. Do you love your color? Then protect it. This powerful, protective leave-in treatment provides instant moisture and color vibrancy that lasts. Formulated with our PRO ColorShield, this pigment-preserving sealant fends off color fade and smooths + seals the cuticle for a luminous color result. This leave-in treatment also prevents split ends, reduces frizz and protects against heat.Application: After cleansing and conditioning with Illuminated Color Shampoo and Illuminated Color Conditioner, apply to towel-dried hair as the next step in your routine and leave in.