Australian summers are hard on AdBlue®. It is recommended to be stored between about −11°C and 30°C, and across much of the country afternoon temperatures pass 30°C for weeks at a time, before you count the extra heat inside a steel shed or a shipping container. Heat breaks urea down into ammonia, which lowers the concentration and shortens shelf life. You can't change the weather, but you can control where your AdBlue sits and how long it sits there.
Where the heat actually comes from
Air temperature is only part of the story. The spots that do the most damage are often the ones nobody thinks about:
- Uninsulated sheds and shipping containers. Metal roofs and walls soak up sun and radiate it inwards. On a still afternoon the inside can sit well above the outside air temperature.
- West-facing walls and bare concrete. A container against a sunny wall or on an exposed slab picks up heat from both.
- Ute trays and truck toolboxes. A drum that rides around in the sun all day, every day, is being slowly cooked.
- Next to equipment. Compressors, generators, parts washers and hot-water units all give off heat.
- Unshaded IBCs. A white or translucent IBC in full sun heats right through, and UV also ages the plastic.
Practical ways to keep it cooler
None of these need a big budget:
- Shade first. A roof, awning or shade sail over an IBC or tank makes the biggest single difference. Blocking the afternoon sun matters most.
- Insulated IBC covers. Where shade isn't possible, an insulated cover slows heating and blocks UV.
- Ventilation. In sheds, roof vents, a whirlybird or simply opening a roller door during the day helps move hot air out.
- Low, not high. Hot air rises. Store drums at floor level rather than on a mezzanine or the top shelf.
- Keep lids closed. Heat speeds up evaporation from open containers, which shifts the concentration and leaves white crystals.
- Think about surroundings. A pale roof or wall reflects more heat than dark cladding. If you are choosing where to put a new tank, that is worth factoring in.
Buy for the season
Summer is a good time to buy smaller amounts more often. At a steady 30°C, the expected shelf life is around 12 months; at 35°C it drops to about 6. If a pallet of drums takes nine months to use and spends summer in a hot shed, the last of it may be close to the end of its life by the time you get to it.
Work out what you actually use each month. The AdBlue usage calculator gives a starting estimate from your diesel use. Then order enough to cover a few weeks to a couple of months, not a whole year. For larger sites, scheduled refills and remote tank monitoring keep product turning over so it doesn't sit in a hot tank for long.
Delivery timing matters too. If an IBC or pallet arrives on a hot day, get it into shade straight away rather than leaving it on the dock or in the yard until someone has time to move it. The same goes for drums picked up and left sitting in a closed vehicle.
For utes and service vehicles, carry only what is needed for the day or week, and keep it in a shaded spot or closed toolbox rather than loose in the tray.
Signs your stock has been too hot
Heat damage isn't always visible, but watch for:
- A strong, sharp ammonia smell when you open the container.
- White crystal build-up around caps and valves.
- Drums that look swollen or distorted.
- Faded, chalky or brittle IBC plastic from long UV exposure.
If you suspect a container has spent a long time above 35°C, have it tested before use. A refractometer checks urea concentration only; a lab test covers the full specification.
Try this on the next hot afternoon: put your hand flat on your AdBlue containers. If they feel warm to the touch, they are sitting above the ideal range. Move them, shade them or cover them before the rest of summer does the damage.
How Liquidia can help
Liquidia can set up regular deliveries so your stock stays fresh through the hot months, and supplies tanks and dispensing gear for fixed sites. Browse the accessories range or ask us about insulated IBC covers and shaded tank setups.