Mercury Extended Life Coolant/Anti-Freeze 877770K1 is engineered for all MerCruiser closed cooling systems in sterndrive and inboard gasoline engine applications. This premium ethylene glycol-based formula provides superior long-term protection, ensuring your engine remains safe from extreme temperatures. Pre-diluted at a 50/50 ratio with de-ionized water, it offers a "ready-to-use" solution that prevents gelling and maximizes the performance of your cooling system.
- For use in all MerCruiser closed cooling sterndrive or inboard gasoline engines
- Extended-life formula protects for up to 5 years or 1,000 operating hours
- Freeze protection down to -34°F (-36°C) and boiling protection up to 265°F (129°C)
- Pre-diluted 50/50 mix with de-ionized water for immediate application
- Will not cause gelling and is compatible with conventional anti-freeze
- Meets rigorous ASTM D-3306 and D-4340 industry standards
- Mercury engine care products provide the best protection and reliability
