BlueDEF® Diesel Exhaust Fluid

Guaranteed Purity from America's #1 Diesel Exhaust Fluid Brand

Diesel Exhaust Fluid (DEF) is one of the key elements of the Selective Catalytic Reduction (SCR) process used by most medium and heavy-duty engine builders to meet EPA 2010 regulations.

BlueDEF 101 - Diesel Brothers on the SCR System and DEF

BlueDEF 101 - Diesel Brothers on the BlueDEF Platinum Benefits

The BlueDEF® Solution

BlueDEF® is a nontoxic solution of 67.5% purified water and 32.5%  ultra pure automotive grade urea. BlueDEF® is not a fuel or fuel additive. Instead, when injected into the exhaust stream and passed over a catalyst, BlueDEF® helps convert NOx into nitrogen gas and water vapor — two harmless and natural components of the air we breathe.


Meets All Quality and Safety Standards

BlueDEF® is stable, colorless and odorless, and meets ISO Standards 22241 for purity and composition and is an American Petroleum Institute (API) certified diesel exhaust fluid. These are the highest quality and safety standards in place to ensure optimum SCR performance.

Easy to Use

Making sure you do not run out of BlueDEF® in an SCR equipped truck is simple — watch the DEF gauge, which is part of the diesel fuel gauge, for when it is time to refill. DEF is stored in a dedicated tank next to the fuel tank on the driver’s side. The tanks range in size from 6 to 23 gallons depending on the truck’s application. The DEF tank fill opening is designed to accommodate a DEF fill nozzle to ensure only DEF is put into the tank. A diesel fuel nozzle will not fit into the DEF tank opening.

Complete Equipment Program

Our patented closed liquid dispensing system provides everything you need to effectively dispense your BlueDEF®. For BlueDEF® to work well product integrity is critical, and our dispensing systems are the only way to maintain this quality. These reusable systems are also cost-effective by providing significant savings over single-use containers. BlueDEF® dispensing systems are available in configurations for a fleet, retail and commercial applications.

Reduce Emissions While Improving Mileage

BlueDEF® is key to helping improve fuel economy by up to five percent while simultaneously reducing exhaust emissions.