• Universal formula for both automotive and heavy duty diesel engines (ASTM D 3306 and ASTM D 4985)
  • Excellent heat transfer properties
  • Superior corrosion protection for aluminum, brass, copper, solder, steel and cast iron
  • Low silicate formulation
  • Concentrate mixes readily with clean tap water
  • Pre-diluted product is ready to use and requires no mixing for top-up and initial fill
  • Compatible with cooling system filters
  • Compatible with heavy duty diesel supplemental coolant additives
  • Compatible with conventional brands of coolant
  • 100% biodegradable in its pure unused form



Shellzone Antifreeze is a high quality, single phase, ethylene glycol based antifreeze. It is a low silicate, all-purpose coolant designed for use in both automotive and heavy duty engines (with the use of SCA’s). Shellzone Antifreeze Preduluted 50/50 volume mixture of Shellzone Antifreeze with deionized water.

Directions to Use

Do not remove radiator cap when engine is hot. Always follow vehicle’s owner’s manual for top-off requirements, change intervals and specified maintenance. Do not add water. Remove radiator cap when engine is cool. Top off radiator and fill reservoir with SHELLZONE 50/50 Antifreeze. Check fluid level periodically. Check owner’s manual for any other recommendations for antifreeze usage.