Features: Removes rust, sludge, and scale Helps prevent overheating Safe for all cooling systems Fast and effective Application: Remove radiator cap (never remove a radiator cap while engine is hot) and pour entire contents into a full cool radiator Replace the cap After engine has reached normal operating temperature, idle for 10-20 minutes with heater on Stop the engine and allow to cool Remove radiator cap and open draincocks For best results, run water from a hose into the radiator just fast enough to overflow slightly Do not add cold water to a hot, empty system With engine idling, flush until liquid runs clear. Shut off engine and allow the system to drain completely Close drain cocks Refill radiator with recommended concentration of Antifreeze/Coolant and water mixture Replace radiator cap to fully closed position Package Contents: 1 XABRO Radiator Flusg RF-505 (354ml)