About DEF

The New Trucks are Rolling Out … Because of Selective Catalytic Reduction (SCR) technology which uses Diesel Exhaust Fluid (DEF), today’s trucks are able to meet the tightened EPA Emission levels while providing the power and fuel efficiency demanded by today’s Fleet Managers and Owner Operators.

Colonial™ Diesel Exhaust Fluid (DEF) manufactured by Colonial Chemical Company meets the industry specification defined by ISO 22241 and was the first American Petroleum Institute (API) certified DEF for sale in the USA.

Colonial™ Diesel Exhaust Fluid (DEF) is available in 1 & 2.5 gallon bottles, 55 gallon drums, 275/330 gallon totes, and in bulk, delivered in dedicated tankers.

Colonial™ Diesel Exhaust Fluid (DEF) AP/ Certified, Colonial Chemical Company is a premier producer of DEF. This ensures that Colonial™ Diesel Exhaust Fluid (DEF) is protected from impurities and thus will not harm your vehicle’s catalyst. Choosing Colonial™ Diesel Exhaust Fluid (DEF) brings you reliability and reassurance!

See DEF Facts for more information.


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