For most of its history in Australia, AdBlue® was something fleets ordered without much thought. That changed in late 2021, when a supply problem on the other side of the world turned it into front-page news. Looking back at what happened is useful, because the underlying risks have not gone away.
What happened
In late 2021 China restricted exports of urea. China was a major supplier of urea to world markets, and Australia relied heavily on imported urea and imported finished AdBlue. With that supply suddenly constrained, prices rose sharply and stock began to disappear from shelves.
Within weeks there was a national AdBlue shortage. Transport operators, farmers and service stations reported difficulty buying product, and there was real concern about what would happen to freight if trucks could not get it. Modern SCR-equipped diesel engines are designed to reduce power, and eventually restrict restarting, when the AdBlue tank runs dry. Running without it is not an option.
The federal government and industry moved to secure additional supply of urea and AdBlue, and the situation eased in early 2022. But for a period, many operators were buying whatever they could find, at whatever price was asked.
Why Australia was exposed
Several things combined to make the shortage hit hard:
- Import dependence. Australia had limited local capacity for the urea itself, so disruptions overseas flowed straight through.
- Concentrated sourcing. Much of the supply chain drew on the same overseas sources, so one export decision affected many suppliers at once.
- Just-in-time buying. Many sites kept only a few days' or weeks' stock on hand, which left no buffer.
- Growing demand. SCR had been standard in heavy vehicles for years under the Euro V-era ADR 80/03, and more cars and utes were using AdBlue too.
Quality problems that came with it
Shortages invite shortcuts. During the crunch, operators were understandably tempted by unfamiliar sellers, reused containers and product with no paperwork. The risk is that off-spec AdBlue, whether it is the wrong concentration, made with fertiliser-grade urea, or contaminated with minerals or metals, can block injectors and filters, damage the SCR catalyst and trigger warning lights or derate. Those repairs can cost far more than the AdBlue saved.
A refractometer will tell you the urea concentration, but it will not detect metal or mineral contamination. Only a lab test does. That is why a Certificate of Analysis and a VDA licence matter most when supply is tight. You can read more about what the licence means on our certification page.
The lessons operators took away
The operators who came through the shortage with the least disruption generally had a few things in common:
- They held safety stock. Even two to four weeks of extra supply bought time to find alternatives.
- They dealt with suppliers who held stock and had more than one source of urea, rather than suppliers relying on a single import channel.
- They had supply agreements or regular orders, which gave them standing with their supplier when allocation began.
- They knew their consumption. Knowing how many litres a week the fleet actually uses makes it possible to plan, allocate and avoid panic buying.
- They didn't compromise on quality. Paying a little more for tested product cost far less than an SCR repair.
One thing you can do today: check how many days your current AdBlue stock would last if deliveries stopped tomorrow. Divide the litres on hand by your average daily use. If the answer is a few days, that is worth addressing before the next disruption rather than during it.
Keep shelf life in mind when building a buffer. Stock kept at or below 25°C lasts about 18 months; in a hot yard it may last as little as six. Rotate stock first in, first out. If you are not sure of your daily use, the AdBlue usage calculator gives a quick estimate.
How Liquidia can help. Liquidia makes AdBlue in Australia and supplies it from Sydney, Brisbane, Melbourne and Perth, with every batch lab-tested. Ask about supply agreements, tanks and scheduled refills on our bulk and on-site page, or find your nearest warehouse on the locations page.