DEF Packaging

​2.5 Gallons
55 Gallons
275 GL Tote
Bulk Delivery

 What is DEF?

DEF is a clear, non-toxic, non-flammable, and nonhazardous organic compound consisting of 32.5% urea and 67.5% de-ionized water that requires no special handling.

• DEF may have a slight odor similar to that of household ammonia.

• DEF is a high-purity urea solution complying with the Standards of ISO 22241.

• DEF is safe to handle.

• DEF weighs approximately 9.2 lbs. per gallon.​

 How much DEF will I use?

Consumption rates vary but are usually around 2 – 4%

of diesel fuel consumed. It can be expected that 1 to 2

gallons of DEF fluid will be used for every 50 gallons of

diesel fuel. See the chart below.


 How does the SCR process work?

​​The NOX reduction process starts with an engine burning clean Ultra Low Sulfur Diesel and producing exhaust that is already much cleaner due to leaner and more complete combustion.

Under the control of the vehicle’s onboard computer, precisely metered spray patterns of DEF are injected into the exhaust stream ahead of the SCR converter allowing the exhaust gases and atomized mist of DEF to enter the converter simultaneously. Together with the catalyst inside the converter, the mixture undergoes a chemical reaction that converts the nitrogen oxides to elemental nitrogen (N2)

and water (H2O).

Exhaust gases are monitored via a sensor as they leave the SCR catalyst. Feedback is supplied to the main computer that adjusts the DEF flow to keep NOX levels within acceptable parameters.


 Why use Diesel Exhaust Fluid(DEF)?

​To achieve the nitrogen oxide (NOX) levels required by the EPA 2010 standard, most engine manufacturers are utilizing Selective Catalytic Reduction (SCR) systems that require the addition of DEF. Off-road engines will be impacted by similar emission standards beginning in 2014.Emmision Regulations.jpg

 How do I know when to refil the DEF tank?

​​The EPA requires manufacturers to put measures in place to ensure that SCR equipped diesel engines do not run

without DEF. In response, manufacturers have equippedboth on-road and off-road SCR units with multiple step

driver notification systems. Before the DEF tank runs empty the operator is given a series of alerts on their dashboard

display. The dashboard DEF indicator will include the following symbol:​

 How long can DEF be stored?

Between 12°F and 86°F, DEF can be stored for a

maximum of 12 months. Shelf life deteriorates to 6 months

when temperatures are held at a constant 95°F or higher​

 Content Editor