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Peak Kleen DEF Diesel Exhaust Fluid is a mixture of high purity synthetic urea and deionized water that is used in Selective Catalytic Reduction (Scr) systems in diesel vehicles. DEF is used to help convert NOX to harmless nitrogen and water.
Compatible with all diesel SCR systems
Non-flammable formula makes handling safe and easy
Conforms to the ISO-22241-1 specification for DEF, and is an american petroleum institute (API) certified diesel exhaust fluid