Your engines work hard every day, no matter the season. From scorching summer afternoons to freezing winter mornings, extreme temperatures put your vehicles and equipment to the test. Without the right coolant, you risk corrosion, poor heat transfer, reduced performance, and costly breakdowns that slow you down. That’s why choosing a coolant you can trust—one that protects in every condition—is essential to keeping your operation running smoothly year-round.
DuraMAX and Drydene products are engineered to perform under pressure—in any season.
Coolant You Can Count On
DuraMAX® and Drydene® Coolants are built for reliability in every condition—keeping your engines running efficiently whether it’s 100° in August or below zero in January.
- Superior heat transfer for optimal temperature control
- Corrosion resistance to protect key engine components
- Consistent performance in both extreme heat and extreme cold
The Right Solution for Every Application
We offer a complete lineup to meet both automotive and heavy-duty needs, so you can protect every piece of equipment in your fleet.
For Automotive Cooling Systems– DuraMAX Automotive Coolants are formulated to meet the highest standards in cooling system protection, with options designed for both conventional and extended-life applications.
Conventional Coolant 
DuraMAX® Conventional Antifreeze & Coolant is an ethylene glycol-based coolant engineered to meet or exceed ASTM 63306 and D4985 requirements for use in a wide range of vehicles—including passenger cars, light-duty trucks, and heavy-duty diesel engines.
Extended Life Coolant 
DuraMAX® Extended Life Antifreeze & Coolant (Concentrate) is a premium, long-life coolant engineered for compatibility with any make or model of car or light-duty truck—foreign or domestic. Its advanced formula is safe for use with aluminum and other engine metals, delivering powerful protection against extreme temperatures, corrosion, and premature water pump failure.
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View DuraMAX Products
For Commercial & Industrial Systems– Drydene Commercial Coolants, built with ALL Technology®, bring superior for superior heavy-duty performance.
SCA (Supplemental Coolant Additive)
Formulas DRYDENE DIESELALL® ELC NITRITE FREE ANTIFREEZE/COOANT READY-TO-USE 50/50 is a heavy-duty nitrite-free antifreeze/coolant built on leading organic acid technology (OAT) that provides extended service and protection without the need for supplemental coolant additives.
ELC NOAT (Nitrited Organic Acid Technology)
DRYDENE DIESELALL® ELC NOAT ANTIFREEZE/COOLANT CONCENTRATE is a premium-grade Nitrited Organic Acid Technology (NOAT) antifreeze/coolant formulated for use in heavy-duty cooling systems requiring nitrite chemistry.
ELC NF (Nitrite-Free) 
DRYDENE DIESELALL® ELC NOAT ANTIFREEZE/COOLANT READY-TO-USE 50/50 is a premium-grade Nitrited Organic Acid Technology (NOAT) antifreeze/coolant formulated for use in heavy-duty cooling systems requiring nitrite chemistry.
Learn more:
View Drydene Products
Each product is engineered to prevent corrosion, optimize heat transfer, and extend engine life—helping you prepare for both the hottest days and the coldest nights.
Don’t wait until freezing weather arrives—order now, save now, and be ready for whatever the forecast brings.
Limited-Time Promotion
Now through September 30, 2025, RelaDyne customers can take advantage of exclusive pallet pricing! This applies to both DuraMAX Automotive Coolants and Drydene Commercial Coolants. Stock up now to stay ready for the months ahead.
Bonus Gift Card Offer:
Earn a $50 or $100 gift card based on qualifying purchases. Just another way RelaDyne supports your business.
Promotion Details:
- One (1) pallet = 36 cases or 4 drums
- Gift cards delivered after invoice is paid
- No returns on special orders
- Offer available while supplies last