Built on Integrity,
Fueled by Trust
Cornerstone DEF Distributors provides reliable delivery of Diesel Exhaust Fluid, Marine AUS40, oil, fuel, antifreeze, coolant, windshield washer fluid, grease, and lubricants — serving the transportation, marine, and industrial sectors with trusted solutions that keep every mile and voyage clean, compliant, and running on time.
Customer-First Focus
Every delivery is shaped around your satisfaction.
Transparent, Fair Pricing
Clear costs with no surprise charges.
Service You Can Count On
Consistent support, every mile and voyage.
Top-Tier DEF and Fluid Solutions
DEF Deliveries (32.5% DEF)
Marine AUS40 Supply (40% Marine Urea)
Oil, Grease, Coolant & Antifreeze
Fuel Delivery
Driven by Delivery Precision
We specialize in bulk deliveries, barge-to-vessel transfers, and full-service logistics for DEF, AUS40, fuel, oil, lubricants, antifreeze, coolant, windshield washer fluid, and grease. Our delivery solutions are built to serve transportation, industrial, and maritime operations with precision, speed, and care. Every order is timed, tailored, and ready to keep your operations flowing smoothly.
Let’s Keep Things Moving
Have questions about bulk delivery, marine transfers, or fluid logistics? Contact us today for fast answers, service details, or a custom quote tailored to your operational needs for DEF, AUS40, fuel, oil, lubricants, antifreeze, coolant, grease, or windshield washer fluid