RTUK X BLACK. Benefits: Maximum Gray Coverage: Designed for resistant grays, this kit provides complete coverage, leaving roots undetectable.. Permanent Color: Enjoy long-lasting, professional-quality results that blend seamlessly with your existing color.. Gentle Formula: Effective yet gentle, this formulation is ideal for sensitive scalps and repeated use.. Convenience: Each kit includes enough product for two full applications, making it easy to maintain your look between salon visits.. Features: Formulated for resistant grays. 100% permanent gray coverage for resistant grays. Gentle, salon-quality Italian Crme Color. 45-minute processing time. Box unfolds into work surface. Includes step-by-step instructions. Shades match and can be used with dpHUE Gloss+ and dpHUE Color Touch Up Spray. Formulated Without: SLS & SLES Sulfates. Gluten.