Radiator Stop Leak (R50)
Nulon Radiator Stop Leak (R50) is formulated to effectively seal leaks in radiator and heater cores, weeping cylinder head gaskets and to temporarily repair corroded welsh plugs.
Nulon R50 is formulated with a base of fibre materials. Safe for seals and hoses, has no effect on metals, including aluminium, and is safe to use in all radiators. R50 is compatible with all corrosion inhibitor and all other anti-freeze/anti-boil products.
Note: If the cooling system is dirty or restricted, first clean it with Nulon R40 Radiator Cleaner.
Pack sizes
NOTE: EXERCISE CAUTION when removing radiator cap if engine is hot.
- Before adding this product, fill coolant to above top radiator hose
- Start engine and turn heater on
- Run engine until normal operating temperature is achieved
- Shake bottle well & add slowly to radiator
- Top up coolant & refit radiator cap securely
- Run engine for 15 minutes to allow product to circulate
- Inspect for leaks
Application Rates
Add 1 bottle for every 10 litres of water or part thereof. To protect cooling systems against corrosion and electrolysis use Nulon R45 Ultra Cool Concentrated Radiator Treatment or one of Nulon's Long Life Coolants.
Caution
Radiator stop leak products should only be used as a temporary repair. You should have a mechanic check and repair the problem at the first available opportunity.
Warning
Often when a cooling system has overheated and boiled, scale and sludge within the system is dislodged and can easily block the core of a radiator that was previously functioning satisfactorily. The sludge and scale can then quite easily cause a blockage in the radiator core when the engine is next operated. Always be aware of this possibility. If such a problem occurs, the best course of action is to have the radiator professionally removed and cleaned.
Product reviews
-
This commment is unpublished.
I am amazed and grateful for this product it saved me from a whole lot of problems
I am a wide load pilot and was escorting a load from Border Village SA to Newcastle NSW just out of Ceduna SA I had a sharp stone punch a hole in one of the radiator flutes which caused a bad leak
If course it was Friday afternoon and no one was available to help or repair the radiator so I finally found a bottle of Nulon radiator repair in the last servo open in Ceduna that night
I must Amit I was not confident it would work but didn’t have a choice I followed the directions and amazingly after about 5 minutes the leak stopped
I randomly ahead trying to find a radiator repair shop to replace the radiator but had no luck until I found a repair shop in Newcastle NSW
So I continued driving escorting the wide load for another 2300 km over three days to Newcastle and am waiting to get the radiator replaced tomorrow morning
Not one drop of coolant has leaked out since the first Nulon leak fix was added I am truly amazed
I now keep a couple of bottles of Nulon leak fix in the pilot car just in case