Wynn's Crystal Clean & Protect is a unique preventative solution for AdBlue crystallization problems. It protects the entire SCR system from AdBlue crystallization, preventing costly repairs to AdBlue components. This treatment dissolves light crystallization in the AdBlue pump, tank unit, and injector, improving SCR/AdBlue operation and eliminating breakdowns due to AdBlue crystallization. It also prolongs the life of components in the AdBlue system. Simply pour directly into the AdBlue tank when filling up.