What’s The Shelf Life Of DEF?
DEF shelf life varies based on storage conditions and exposure to the outside environment. The maximum shelf life is two years, though this is attainable only if you store the DEF under ideal conditions. You can usually expect the fluid to last for at least one and a half years. These figures, of course, only account for DEF that has been recently produced. Always check the expiration date on any DEF you buy to make sure the manufacturer has not been storing it for a long time.
What Can I Do To Extend The Shelf Life Of My DEF?
The first step in maximizing DEF shelf life is to store it in the right container. The fluid contains deionized water, meaning that it reacts with any materials that contain ions. You should only store it in containers made of deionized materials, such as stainless steel or high-density polyethylene.
The next step is to control the temperature. DEF will freeze if it becomes colder than 12°F (-11°C), and will degrade if it becomes warmer than 86°F (30°C). The easiest way to prevent freezing is to store it indoors, though many business owners are uncomfortable doing this in case it leaks. If you chose to store it outside, make sure to install a heater and a thermostat. It is particularly important to prevent the material from being exposed to sunlight/uv . Sunlight not only raises the temperature, but the ultraviolet light also degrades the material in its own right.
If for some reason you cannot prevent your DEF from freezing, make sure to leave space in each container when filling to allow for expansion in case of freezing . DEF expands when it freezes, and if this happens in a full container, it can crack the container and cause loss of product.
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