AdBlue users sometimes notice white deposits around the tank cap, nozzle, or refuelling equipment.
This phenomenon is generally related to the drying of AdBlue.
The product contains a high proportion of water. When a small amount is spilled and remains exposed to the air, the water can gradually evaporate, leaving deposits.
This is commonly known as AdBlue crystallisation.
To limit the phenomenon, the first precaution is to ensure a clean refuelling process.
Avoid overflows and spills as much as possible. If AdBlue is spilled around the refuelling area, quickly clean the surface according to the recommendations applicable to your vehicle and equipment.
It is also best to keep refuelling accessories clean.
The presence of crystals around the cap does not necessarily mean that a vehicle is broken down, but significant deposits or error messages related to the AdBlue system must be diagnosed correctly.
A clean refuelling process and suitable equipment can already help avoid some of the inconveniences associated with spills.
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