- This Cationic, Sulfate-Free Shampoo is formulated with the perfect amount of violet pigment, ideal for home maintenance. pH 4.0-5.0. The Repair system by Enjoy clarifies, repairs and protects damaged, brittle and chemically treated hair while preparing it for any chemical service. Apply to wet hair, work into lather, leave on for 1-5 minutes or until desired tone is achieved and rinse out. May repeat if necessary. Results may vary, final results of hair will be determined by the health of hair, beginning color of hair, and amount of time the product is left on. Porous hair may process quicker.