DEF Tote Heaters. What is Diesel Exhaust Fluid (DEF)?

Diesel Exhaust Fluid (DEF) is a non-hazardous solution, which is 32.5% urea and 67.5% de-ionized water. DEF is sprayed into the exhaust stream of diesel vehicles to break down dangerous NOx emissions into harmless nitrogen and water. This system is called Selective Catalytic Reduction (SCR) and can be found on 2010 and later model year trucks and many diesel pickups and SUVs. DEF is not a fuel additive and never comes into contact with diesel. It is stored in a separate tank, typically with a blue filler cap.

Diesel Exhaust Fluid (DEF)
                                   DEF Tote

When Does DEF Freeze?

The urea mixture has a much lower freezing point of 12 degrees Fahrenheit, which is -11 degrees Celsius. This solution doesn’t break into just urea and just water, either. The solution freezes at the same rate, and also thaws at the same rate. This means that at no point does the DEF freezing cause the solution to become over concentrated or diluted. Since DEF freezing and thawing occurs at the same rate, there is no harm to the product which means that the urea solution is still safe to use if it has been frozen!

Can Anything Be Added to Prevent DEF Freezing?

Many people want to know if they can add anti-gelling or freeze-point-improver to the DEF mixture in order to prevent it from freezing. Additives should NOT be added to the urea solution because DEF must remain pure. The quality of DEF is extremely important to allowing it to perform correctly. Adding any additives would damage its ability to perform correctly and could even result in damages to the SCR system. No additives are approved at this time for mixing into DEF.

Since DEF is susceptible to freezing and there are no approved additives to prevent it from freezing & gelling in cold temperatures the BEST solution is a heated jacket wrap from Powerblanket®.

DEF Tote Heaters
DEF Tote Heaters


Diesel Exhaust Fluid (DEF)

Diesel Exhaust Fluid (DEF) Freeze Protection

Freeze protection and temperature control for DEF in EXTREME COLD locations has never been easier.  The DEF Industry now has a viable solution for heating Diesel Exhaust Fluid and protecting IBC Totes, pumps, and hoses from freezing temperatures in extreme cold weather environments. By teaming with industry giants, Powerblanket® has received valuable feedback in the design and manufacturing process, allowing for a complete & effective heating solution for DEF.

• Heat, insulate and protect DEF year round
• Protect pump housing, valves, hoses, & nozzles
• Best solution for viscosity & flow control in Extreme Cold
• Insulated full wrap design – keeps the heat in & cold out
• Target temperature 70˚ ± 5° F / 21˚C ± 3° C
• Safe on a wide variety of materials
• Adjustable thermostat for pinpoint temperature control
• Certified to UL/CSA/CE safety standards
• Designed for 330 gallon/1250 Liter  &  275 gallon/1040 Liter DEF Totes ; 120V, 12.00A, 1,440W

Powerblanket’s lightweight heated enclosure is engineered to protect the pump housing, hoses, nozzles, valves, and holding tanks from freezing. Filling stations, farmers, fleet managers, and end users now have an affordable heating solution for their DEF products without worry of gelling, spoiled product, or frozen lines.

Contact Heat Authority TODAY. Toll Free (866) 805-HEAT 4328

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Diesel Exhaust Fluid (DEF) Protection

For more information on DEF Tote Heaters and where to purchase DEF go to the following website: