Diesel Exhaust Fluid Quality Matters

Why should you care about DEF Quality?

The emission system installed on your vehicle is a very expensive and precise configuration of fluid control, sensors, filters, precious metal catalyst and heaters. For long term, maintenance free operation of your emission system the critical determining component is the diesel exhaust fluid (DEF). Although DEF is considered a simple configuration of high purity urea and deionized water DEF can be easily contaminated causing costly repairs.

Where is your diesel exhaust fluid coming from?

DEF can be produced through a blending process which combines 32.5% high purity urea – a nitrogen base widely used in fertilizer – with 67.5% de-ionized water.

Blending uses high-purity granules (prill) blended with high-purity water. The urea is highly soluble and non-toxic, which makes the blending process so simple. It's absolutely crucial to know where Diesel Exhaust Fluid is coming from before it reaches your tank. The simplicity to produce DEF generates concern in the market since any trace of contamination can lead to a costly fix.

Read more about the risk of DEF blenders

The risk in compromising quality

If Diesel Exhaust Fluid is not handled properly, there's potential for major problems including:

  • Voided vehicle warranties
  • Premature catalyst deactivation
  • Detrimental effects to SCR performance
  • Lower fuel economy
  • Fouled pre-filters & injector nozzles

Handling DEF: Do's and don'ts

DEF is tested in-house before it reaches your tank

Our DEF is tested for quality from alkalinity to urea content at each of our locations, during repackaging, and before the fluid is delivered to our customers. We're the ONLY North American DEF distributor with in-house lab quality testing which includes:


Testing for DEF quality & concentration.


Testing to all 18 DEF parameters by ISO 22241.

3 Easy DEF testing methods

Quality is of the utmost importance when handling and delivering Diesel Exhaust Fluid (DEF). We'll take you through three proper ways you can test DEF quality.

Contact us for more information

Contact us today by completing the short form to find out more about our specialty chemical product line, or if you have a question about our DEF products.