Hany Guide To Avoid Costly Repairs.
If your diesel vehicle was manufactured after 2015, AdBlue is likely a part of your life. While it is a non-hazardous, non-toxic liquid, it is incredibly sensitive. One small mistake in how you store or handle it can lead to a “No Start” countdown on your dashboard or a costly trip to a specialist like us for an AdBlue system repair.
1. Temperature is Everything
AdBlue is a solution of 32.5% high-purity urea and 67.5% deionized water. This specific balance is what allows it to break down harmful NOx emissions, but it is also what makes it vulnerable to the weather.
- Avoid the Heat: AdBlue begins to decompose if it is stored at temperatures consistently above 30°C. High heat causes the urea to break down, reducing its effectiveness and shortening its shelf life.
- Prevent Freezing: AdBlue freezes at -11°C. While it can be thawed and used again without losing its properties, the expansion during freezing (about 7%) can crack plastic bottles or damage storage tanks if they are filled to the brim.
- The Sweet Spot: Aim to store your AdBlue in a cool, dry place between 5°C and 20°C.
2. Keep it Out of the Light
Direct sunlight is one of AdBlue’s biggest enemies. UV rays accelerate the degradation of urea. Even if the temperature is stable, a bottle left in the sun on a windowsill or in the back of a van will go “off” much faster than one kept in a dark cupboard or an opaque, UV-stabilized tank.
3. Watch the Expiration Date
Many people don’t realize that AdBlue has a shelf life.
- Unopened: In ideal conditions (cool and dark), it can last 12 to 18 months.
- Opened: Once the seal is broken, try to use it within 6 months.
If you notice the liquid looks cloudy or has white crystals floating in it, do not put it in your tank. This is a sign of contamination or degradation that can clog your injectors.
4. The “Zero Contamination” Rule
The SCR system in your vehicle is incredibly delicate. Even a teaspoon of dust, fuel, oil, or tap water can ruin the catalyst.
- Never reuse containers: Don’t use an old diesel can or a water bottle to transport AdBlue.
- Dedicated equipment only: If you use a funnel or a pump, it must be used only for AdBlue. Even trace amounts of oil can trigger a system-wide failure.
- Seal it tight: Always ensure the cap is screwed on tight after every use to prevent dust and moisture from entering.
5. Use the Right Materials
AdBlue is mildly corrosive to certain metals like copper, brass, and some grades of steel. If you are storing it in bulk, only use containers made of:
- High-Density Polyethylene (HDPE)
- Polypropylene
- Stainless steel
Summary Checklist for AdBlue Storage:
- [ ] Store in a cool, dark place (ideally 5°C–20°C).
- [ ] Keep away from direct sunlight.
- [ ] Use only dedicated, clean dispensing equipment.
- [ ] Check the “Use By” date before filling.
- [ ] Keep the container sealed to avoid dust and evaporation.
Need Professional Help?
If you’ve accidentally used contaminated AdBlue, or if your dashboard is showing AdBlue fault codes despite having a full tank, we can help. At Carbon Clean Co, we offer specialized AdBlue diagnostics and repairs to get your vehicle out of “limp mode” and back on the road.
Contact us today at 01509 434989 for expert advice or to book a mobile service across the East Midlands.