DEF Quick Facts - Freeze & Thaw
Q: Will DEF be harmed if it freezes and then thaws?
A: No, the fluid will remain unharmed. The urea and water will not separate or lose its strength.

Q: Will DEF be harmed if it freezes and then thaws?
A: No, the fluid will remain unharmed. The urea and water will not separate or lose its strength.