No more layering color over color! Color Prep from Color Oops rinses away dull hair color build-up with an advanced formula designed to prepare your hair for truer color results. You can now switch hair color shades easily by using our safe and gentle formula to start fresh. Color Prep shrinks the dye molecules, allowing you to simply wash them away in just 20 minutes. And our unique formula is gentle enough to use every time you re-color your hair. Give your hairstyle a fresh start and your hair color a clean slate with Color Oops Color Prep!