Durexยฎ Heavy Duty Extended Life Antifreeze / Coolant 50/50 Pre-Mix is a premium quality nitrited organic acid technology, virgin ethylene glycol-based fluid. Specially formulated with industry=leading additives, this product provides extended service maintenance protection in engines requiring a heavy duty NOAT coolant. Provides up to 1,000,000 miles on-road / 8 years or 20,000 hours off-road protection*.
- Free of 2-ethylhexanoic acid (2-EH), phosphates, silicates and amines
- Meets ASTM D6210, D3306 and TMC RP329 specifications
- Ideal for CAT or mixed fleets
- No addition of SCAs required*
- Offers excellent wet sleeve liner cavitation protection, with a nitrite and molybdate additive combination
- Protects from -34 F to 265 F
NOTE: Do not add water
*HD Extender may be needed based on test results. Consult your vehicleโs ownerโs manual for recommendations.







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