5in1 Radiator Stop Leak is a coolant additive for petrol and diesel engines that permanently seals radiator leaks. Simple hairline cracks in the radiator are often overlooked during servicing. These hairline cracks can cause long-term leaks. A leak is detected by the 5in1 radiator stop leak and filled with sealing compounds.

Properties
- Stops and prevents leaks
- Protects the cooling system
- Added corrosion inhibitors
- Helps to prevent clogging
- all types of coolant and antifreeze
- Reliably seals and prevents hairline cracks and leaks in the radiator, water pump, cylinder head and engine block.
- Eliminates the need for costly repairs
- Protects the entire cooling system against rust and corrosion
- Lubricates the water pump
- Contains no acids and is non-toxic
- Does not attack rubber hoses, metal parts and gaskets

Instructions for use
all aluminium, plastic and steel radiators of cooling systems in petrol, diesel and LPG engines. Compatible with water, coolants and conventional antifreeze. Not cooling circuits with a built-in filter unit. Shake very well before use. Add the contents of the can to the slightly warm (but NOT hot!) cooling system with the engine switched off.

It is recommended to add the contents directly into the radiator. If the radiator is a closed system, the contents can also be added to the coolant expansion tank. After adding, close the cooling system tightly, start the engine and let it run for 10 minutes or drive a short distance with the heating system switched on.

Important: be careful when opening the radiator or cooling system: hot coolant or steam may escape from the system! Contaminated cooling systems should first be cleaned with TecLub Radiator Cleaner.

One 310 ml bottle is sufficient for cooling systems with a capacity of up to 12 litres.