Covers gray. Makes colors last longer. Decreases fading. For professional use only. It is a unique way to cover resistant gray hair, and bring vibrancy and intensity to all hair coloring. Gray Magic: When added to haircolor will obtain coverage on resistant gray hair. Should be added to ANY color formula to achieve vibrant effects while downplaying green tones and will help alleviate chlorine discoloration. Performs with ALL colors, tones, tints, and every non peroxide haircolor. Will especially intensity and enrich red formulas. Has additional wetting agents and concentrate color to allow moisture to fully penetrate the cortex. Is a highly concentrated additive that must be used with haircolor to achieve complete coverage. Can be added to neutralizers to replenish color when perming tinted red or warm colors. When added to shampoos or conditioners, will prevent fading and oxidation for tinted red or warm colors.