Cornerstone DEF Distributors

At Cornerstone DEF Distributors, we specialize in the reliable supply and delivery of high-quality Diesel Exhaust Fluid (DEF) and marine-grade 40% urea, serving the Gulf Coast and beyond. With a focus on integrity, efficiency, and customer service, we provide tailored solutions to meet the demanding needs of marine, industrial, and transportation sectors. Our Core Services & Products: Bulk DEF & 40% Urea Supply •Marine-grade 40% urea delivered via barge or bulk tanker •Land-based bulk DEF deliveries for fuel terminals and fleet operators •Consignment tank programs and bulk storage solutions available Packaged DEF Products •2.5-gallon jugs and cases (retail-ready) •55-gallon drums and 275/330-gallon totes •Custom-branded DEF packaging for distributors and retailers Turnkey Marine Vessel Deliveries •Direct-to-vessel barge delivery with 200 ft hose capacity •On-barge welding team for customized flange connections •Rapid, efficient service designed to meet tight port schedules Logistics & Supply Chain Support •Flexible delivery schedules (3–5 day lead time) •Full Truckload (FTL) and Less-than-Truckload (LTL) coordination •Scalable solutions for retail, commercial, and industrial partners Strategic Partnership Programs •White-label opportunities for established brands •Vendor-managed inventory and consignment programs •Custom pricing models: FOB and delivered rates available