AUS 40

AUS 40 is a high-purity, urea-based solution specifically formulated for marine and industrial diesel engines to reduce harmful emissions. It is used in Selective Catalytic Reduction (SCR) systems, where it helps convert nitrogen oxides (NOx), a major pollutant, into harmless nitrogen and water vapour.

Made from 40% urea and 60% deionised water, AUS 40 is designed for high-demand applications such as marine vessels and stationary engines. Like AdBlue®, it is not a fuel additive and is stored separately from the fuel system.

AUS 40 plays a critical role in meeting stringent marine emission standards, including IMO Tier III requirements, while supporting efficient engine performance.

Southern Blue supplies high-quality AUS 40 you can rely on, ensuring consistent performance, system protection, and dependable delivery when it matters most.

Reliable AUS 40 supply for Australian marine and industrial sectors

Manufactured by Southern Blue

Southern Blue proudly manufactures AUS 40 in Australia, giving our customers confidence in both product quality and supply reliability. Unlike imported alternatives, our locally produced marine DEF is backed by strict quality control and a supply chain built to support Australian marine and industrial operations without delays.

Quality Assurance

Southern Blue AUS 40 is manufactured in accordance with ISO 18611 standards, ensuring consistent quality, purity, and performance across every batch. Our marine-grade urea solution is designed to meet the demands of modern SCR systems, helping reduce NOx emissions while protecting critical engine components from contamination and build-up.

Applications & Ordering

AUS 40 is required for marine vessels and industrial diesel engines equipped with Selective Catalytic Reduction (SCR) systems, particularly those operating under IMO Tier III emission standards.

Whether you're managing a commercial fleet, port operation, or industrial site, Southern Blue provides flexible AUS 40 supply options including bulk delivery, IBCs, and packaged solutions.

To order AUS 40 or request a quote, contact the Southern Blue team today and secure a reliable supply of high-quality marine DEF.