Paul Mitchell Bond Rx Step 1 Professional Bond Builder 8.5 oz Turn any lightening or permanent hair color service into a bond building treatment. Or use it as a stand-alone service to help restore strength and resilience to the hair.* Professional Bond Builder: Forms a consistent, protective barrier from root to tip. Reduces exposure during lightening and hair color services without altering the formula. Delivers faster, brighter lift without additional processing time.** Must be followed by Step 2 of the Bond Rx Professional System (sold separately). Easy Measuring + Application - Includes NEW spray applicator + measuring unit dispenser: Measuring unit dispenser adds the exact amount to lightener and permanent color formulas. New sprayer applicator is ideal for stand-alone services. *Using Step 1 and Step 2, as compared to virgin hair. Results based on third-party clinical testing. **Using Step 1, as compared to market leader. Listing and template services provided by inkFrog