SOUTHERN 40™
SOUTHERN40™ is Southern Blue's premium AUS40 (40% automotive-grade urea solution), engineered for marine and industrial Selective Catalytic Reduction (SCR) (SCR) systems.
Designed for high-performance diesel applications, SOUTHERN40™ helps convert nitrogen oxides (NOx) into harmless nitrogen and water vapour, supporting cleaner emissions while protecting critical engine components.
Manufactured using 40% high-purity automotive-grade urea and 60% deionised water, SOUTHERN40™ is designed for marine vessels, industrial engines and stationary equipment operating under stringent emissions standards, including IMO Tier III requirements.
Like AdBlue®, SOUTHERN40™ is not a fuel additive. It is stored in a dedicated tank and injected into the exhaust system as part of the Selective Catalytic Reduction (SCR) process.
Southern Blue supplies SOUTHERN40™ Australia-wide in bulk, IBC and packaged solutions, providing reliable product quality, dependable supply and technical support for marine and industrial customers.
Manufactured by Southern Blue
Southern Blue proudly manufactures Southern40™ - 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
Southern40™ - 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 & Supply
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.
SOUTHERN40™ is a trademark of Southern Blue for AUS40 (40% urea solution).