Sierra 189340C Heavy Duty Extended Life Coolant Pre-Mixed 50/50 1 Gallon

Sierra 189340C Heavy Duty Extended Life Coolant is a pre-mixed 50/50 antifreeze formulation designed specifically for marine and powersports engines. This ready-to-use coolant provides superior protection against freezing, boiling, and corrosion without requiring dilution.

Key Features:

• Pre-mixed 50/50 formula ready for immediate use
• Extended service life of up to 7 years or 15,000 hours
• Yellow color for easy identification and leak detection
• Heavy-duty formulation protects against freezing down to -34°F and boiling up to 265°F
• Advanced corrosion inhibitors protect aluminum, steel, cast iron, and copper components
• Compatible with marine engines, generators, and powersports equipment
• Convenient 1-gallon jug with English/French bilingual packaging

This heavy-duty extended life coolant eliminates the guesswork of mixing ratios and provides long-lasting protection for your engine's cooling system. The advanced formula meets or exceeds industry standards for marine and recreational vehicle applications, helping prevent costly repairs from corrosion, cavitation, and overheating.