Your One-Stop Shop for Everything DEF

Welcome to Certified DEF—the place to find all the essentials for your diesel exhaust fluid (DEF) needs at prices you can’t find anywhere else. We manufacture and supply high-quality diesel exhaust fluid for sale, as well as distribute DEF equipment and accessories nationwide.

Whether you’re a local retailer, a wholesaler in your state, or the fleet manager, we have an extensive network of facilities located across the U.S. to effectively meet your unique demands and provide all the services and supplies you need.

The Premiere Choice for DEF & Supplies

We stand above the other manufacturers of DEF fuel, pallet, and pump vendors and distributors because of our steadfast commitment to quality assurance. We strictly abide by the stringent set of guidelines of the EPA to ensure your trucks perform at their peak, allowing your business to outpace your competitors and keep up with industry standards.

Our company is certified by the American Petroleum Institute as well as meets ISO 22241 standards, and we make every effort to produce superior products that will set you apart from the competition. We only hire highly trained and professional staff who can assist you with any questions you might have whenever you call. You can always expect prompt, friendly service from a knowledgeable professional when you need our assistance.

Unbeatable Prices and Free Delivery

At Certified DEF, we sell a wide variety of products by the jug, drum, tote and even in bulk. What we don’t do is charge additional fees for shipping—your delivery is always free. We know you work hard to earn your money and you want to spend it in a way that benefits your business. Low pricing plus zero shipping means more savings and profits for your business.

Order Today

Take a tour of our site to discover the products we manfacture and distribute to push your business forward. Contact us today so we can help you find what you need.