Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
⚠️ California Proposition 65 Warning : Some products sold on this website may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
For more information, visit www.P65Warnings.ca.gov.
This fluid meets all EPA standards, as well as AUS 32, DIN 70070, and ISO 22241 purity and concentration standards. Our Ultrapure DEF is formaldehyde free. The NOx reducing treatment is specifically formulated for diesel engines equipped with SCR systems. Each case includes a dispensing nozzle and the product can be used without removing the box.
I purchased the Prime Guard DEF and it's been working great for my diesel truck. The 2.5-gallon size is just right for my usage without taking up too much space. I like that it comes in a sturdy container too, no leaks so far!
J
Jin Park
Not impressed with this DEF
I had high hopes for the Prime Guard product, but it didn't perform as well as I expected. My engine had some issues after using this fluid, and I switched to a different brand. The container was also difficult to pour without spilling.
L
Linda Thompson
Decent product but slow shipping
The DEF itself seems fine, but I was disappointed with the delivery time. It took longer than estimated to arrive. Once I got it, the product worked as expected and I've had no issues with my engine since using it.
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FAQs
Have a question ? We are here to help.
Is the shipping free?
Yes, we offer free standard shipping on all orders within the United States.
When will I receive my item?
Domestic orders typically arrive within 3-5 business days. Delivery times are estimated and may vary depending on your location, weather conditions, or other unforeseen factors.
Can I change or return my item?
We hope you love your purchase, but if you need to make a change or return your item, we’ve got you covered! You can initiate a return or exchange within 30 days of receiving your order. Please ensure the product is in its original condition and packaging. For more information on our return policy, please visit our Returns & Exchanges page.
