Formulated to remove heavy scale buildup and rust in later model radiators. It removes more scale in 10 minutes than competitive products do in 3 hours*. Heavy duty to extend the life of vehicles. Removes 10x more scale buildup than the leading product*. Contains no phosphates, ammonia or bleach. Safe for employees. *Proven in third-party tests. Based on 30 minute flush with average 3 gallon radiator Available In: 4 Pack of 1 GAL CLR PRO Heavy Duty Radiator Flush and Cleaner Safety Data Sheet CLR PRO Heavy Duty Radiator Flush and Cleaner Spanish Safety Data Sheet CLR PRO Heavy Duty Radiator Flush and Cleaner Tech Data Sheet CLR PRO Heavy Duty Radiator Flush and Cleaner Product Catalog