CLR Pro Heavy Duty Radiator Flush and Cleaner

Item Details

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 4x1 gallon case

Instructions 

• With engine cool, drain the cooling system.
• Pour solution into the radiator and fill remainder with water.
• Use 24oz for every 3 gal. of cooling system capacity.
• Turn heat to high inside car to flush the heater core.
• Run engine at normal operating temperature for 10-30 minutes.
• Allow engine to cool. Drain and flush with water until clear.
• Drain system and refill with appropriate coolant mixture.

Do not exceed 2.5 hours at any point during cleaning. Dispose of coolant in accordance with local and national regulations. Never open a radiator cap when engine is hot.