Skip to Content
Keller-Heartt has Truegard Propylene Glycol Heat Transfer Fluids in both Inhibited and Food Grade! Order Today!
Propylene Glycol Available. Order Today!
Request a Quote B2B Account Program Government Sales Shipping Policy
Best Sellers badge
Blue DEF 55-Gallon Drum Premium Diesel Exhaust Fluid

Blue DEF 55-Gallon Drum Premium Diesel Exhaust Fluid

by BlueDEF
SKU DEF001

$320.25 - $320.25
$320.25
$320.25 - $320.25
$320.25

Diesel exhaust fluid is one of the key elements of the Selective Catalytic Reduction (SCR) process used by most medium and heavy-duty engine builders to meet EPA 2010 regulations. Blue DEF is a non-toxic solution of 67.5 percent purified water and 32.5 percent ultra pure automotive grade urea. Blue DEF is not a fuel or fuel additive. Instead, when injected into the exhaust stream and passed over a catalyst, Blue DEF helps convert NOx into nitrogen gas and water vapor, two harmless and natural components of the air. Blue DEF is stable, colorless and odorless, and meets ISO Standards 22241 for purity and composition and is an American Petroleum Institute (API) certified diesel exhaust fluid. These are the highest quality and safety standards in place to ensure optimum SCR performance. Making sure you do not run out of BlueDEF in a SCR equipped truck is simple, watch the Diesel Exhaust Fluid (DEF) gauge, which is part of the diesel fuel gauge, for when it is time to refill. DEF is stored in a dedicated tank next to the fuel tank on the driver's side. The tanks range in size from 6 to 23 gallons depending on the truck's application. The DEF tank fill opening is designed to accommodate a DEF fill nozzle to ensure only DEF is put into the tank. A diesel fuel nozzle will not fit into the DEF tank opening. There may be a $75 lift gate fee if delivery requires a lift gate from the carrier.

Buy DEF in Bulk

BlueDEF diesel exhaust fluid from Peak is the first choice of many American automakers, dealerships, and mechanics because it outperforms competing technology and provides essential ingredients for the performance and lifespan of an exhaust after-treatment system. BlueDEF is made from the purest ingredients, it works hard to purify your emissions and leads the field in environmentally friendly solutions for diesel vehicles. 


At Keller-Heartt, we are proud to offer BlueDEF diesel exhaust fluid in 55-gallon drums. The size is perfect for tucking in a niche of your shop, your garage or your hangar to ensure that our diest exhaust fluid option is ready when you need it. This non-hazardous diesel exhaust fluid is ready to ship.

Show More Less
Product Data Sheet
Safety Data Sheet

Product Specs

  • Application
    Diesel Trucks, Diesel Fleets
  • Availability
    Ships within 24 hours
  • Contents
    Diesel Exhaust Fluid
  • Package Size
    55 Gallon Drum
  • Product ID
    168-2
  • Purity Details
    Fewer than 0.5 ppm of heavy metals such as iron and aluminum. Fewer than 0.2 ppm of copper, zinc and chromium. With low phosphates and no more than 20 ppm of insoluble matter.
  • Purity/Concentration Standards
    AUS 32, DIN 70070 and ISO 22241
  • Urea Concentration
    32.5%, +/- 0.7%
  • Weight (Per Package)
    55 Gallons

Frequently asked questions

Find answers to common questions about our products and services

  • Blue DEF is intended for diesel trucks and fleets equipped with Selective Catalytic Reduction (SCR) exhaust after-treatment systems, including most medium and heavy-duty diesel engines that use SCR technology.

  • When Blue DEF is injected into the exhaust stream and passed over a catalyst, it helps convert NOx into nitrogen gas and water vapor — two harmless, naturally occurring components of air. It is not a fuel or fuel additive; it works exclusively within the exhaust after-treatment process.

  • Blue DEF contains 32.5% (±0.7%) ultra-pure automotive-grade urea, with the remainder being purified water. This precise concentration is required to meet AUS 32, DIN 70070, and ISO 22241 standards; deviating from this range can impair SCR system performance.

  • Blue DEF is formulated to contain fewer than 0.5 ppm of heavy metals such as iron and aluminum, fewer than 0.2 ppm of copper, zinc, and chromium, low phosphates, and no more than 20 ppm of insoluble matter. This high purity level is critical for protecting the SCR catalyst and ensuring optimum after-treatment system performance and longevity.

  • DEF level is monitored via a gauge that is integrated into the diesel fuel gauge. DEF tanks on SCR-equipped trucks range from 6 to 23 gallons depending on the vehicle's application, making a 55-gallon drum a practical bulk supply for regular refills and fleet use.

  • No — the DEF tank fill opening is designed specifically to accept a DEF fill nozzle only. A diesel fuel nozzle will not fit into the DEF tank opening, which prevents accidental cross-contamination between the two fluids.