Extended Life Coolant/Antifreeze 877770Q1 is for use in all MerCruiser closed cooling systems in stern drive and inboard gasoline engine applications. This coolant is pre-diluted to a 50/50 mix with de-ionized water. See your owner's manual or service manual for specific application and instructions. 

• For use in all MerCruiser closed cooling sterndrive or inboard gasoline engine applications
• Provides 5-year, 1,000 operating hour extended life protection
• Silicate and phosphate free
• Ethylene glycol based, pre-diluted to 50/50 mix with de-ionized water
• Will not cause gelling
• Compatible with conventional anti-freeze
• Meets ASTM D-3306, ASTM D-4340 requirements