Ready to fill. Extended life. Pre-diluted 50/50. Do not add water. Contains bitterguard to aid in the prevention of swallowing. Shellzone Multi-Vehicle Extended Life Antifreeze/Coolant pre-diluted 50/50 is a ready to fill 5 year (extended life with complete flush and fill) or 150,000 mile antifreeze/coolant products. This antifreeze/coolant contains inhibitors that provide effective protection against the effects of extreme heat, corrosion and rust. Shellzone Multi-Vehicle Extended Life Antifreeze/Coolant pre-diluted 50/50 will provide cooling system protection for 5 years (extended life with complete flush and fill) or 150,000 miles. This product should be used as purchased and should not be further diluted. Benefits: 5 year (extended life with complete flush and fill)/150,000 mile protection with complete drain and fill; protects against water pump cavitation; effective high temperature protection; protects against corrosion of all metal including aluminum; no color change when added to existing fluid; phosphate free, low silicate; product is pre-mixed and ready to fill. Tested against: ASTM D4340, ASTM D1384, ASTM D2809, ASTM D3306. Contains bitterguard, a bittering agent to aid in the prevention of swallowing. Made in USA.