GC® API Registered DEF

GC® API Registered DEF is manufactured with 32.5% high-purity synthetic urea and 67.5% deionized water designed for use in passenger vehicles, trucks, and construction & agricultural equipment. It is compatible with all Tier 4 final compliant equipment using Selective Catalytic Reduction (SCR) technology. GC® DEF prevents SCR breakdown, reduces harmful nitrogen oxide emissions by up to 90% and improves fuel efficiency by up to 8%. It is a simple-to-use, low cost, clean solution for meeting 2010 EPA Clean Air Act requirements.

Purity of diesel exhaust fluid is important to maintaining a functioning SCR system. Any chemical impurity in DEF can lead to failure of an SCR system, making it very important to use only DEF products meeting ISO 22241-1 standards. GC® DEF-32.5 is a stable, colorless, nonflammable, nontoxic fluid that conforms to the ISO-22241-1 specification.


It is approved for use in all Diesel SCR Systems.



Meets Industry Specifications

ISO 22241, AUS32

Recommended for

All Diesel SCR Systems.






10000053 / 2.5 Gallons

10000055 / 55 Gallons

10000051 / 330 Gallons

Packaging information

Part # Size Case quantity Cases per pallet Case weight
10000053 2.5 gallons 2 40 22.75
10000055 55 gallons 1 4 539.3
10000051 330 gallons 1 1 3,086