Diesel Exhaust Fluid is a dilute urea solution made with 32.5% urea and 67.5% deionized water. It is used in modern diesel engines to reduce nitrogen oxides that are produced during combustion.
DEF is a clear, colorless solution that should be stored in a cool, dry place out of direct sunlight. Diesel Exhaust Fluid will freeze at approximately 12 degrees F. It weighs about 9 pounds per gallon. Heat will shorten the shelf life of DEF.
HDPE is the most economical tank material for Diesel Exhaust Fluid (DEF), rated Excellent. Polypropylene, nylon and PVDF (Kynar®) are also rated Good or better. Avoid PVC fittings.
How Diesel Exhaust Fluid (DEF) works with the plastics used to make our storage tanks.
| Material | Rating |
|---|---|
| HDPE | |
| Polypropylene | |
| Nylon | |
| PVDF (Kynar®) |
How Diesel Exhaust Fluid (DEF) works with the plastics used for tank fittings.
| Material | Rating |
|---|---|
| HDPE | |
| PVC | |
| CPVC | |
| Polypropylene | |
| PVDF |
How Diesel Exhaust Fluid (DEF) works with gasket and O-ring materials.
| Material | Rating |
|---|---|
| Buna-N | |
| EPDM | |
| Viton® |
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