Radiator Stop Leak

Radiator Stop Leak

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. 

NOTE: EXERCISE CAUTION when removing radiator cap if engine is hot.

  1. Before adding this product, fill coolant to above top radiator hose
  2. Start engine and turn heater on
  3. Run engine until normal operating temperature is achieved
  4. Shake bottle well & add slowly to radiator
  5. Top up coolant & refit radiator cap securely
  6. Run engine for 15 minutes to allow product to circulate
  7. 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.

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FAQs

Frequently Asked Questions

Will Radiator Stop Leak stop a coolant leak in my car?

3 years ago

Radiator Stop Leak is a product that will seal minor leaks in a vehicle cooling system. This product should only be used as a temporary repair. You should have a mechanic check and repair the problem at the first available opportunity.

2 of 4 people found this helpful
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Related Questions

Is tap water suitable to add with Nulon coolants?

3 years ago

Tap water quality can vary widley depending on your location. It is best to use deminalised or deionised water, as tap water contains chemicals and minerals which can effect the performance of the coolant.

50 of 53 people found this helpful
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Why do I need antifreeze coolant when I don’t live in a cold climate?

3 years ago

Most modern cars run their cooling systems at temperatures close to 100 degrees celsius. The bonus of using the antifreeze chemical (glycol) in coolant is that it also raises the boiling point. This gives protection against localised or hot spot boiling which can cause engine damage.

31 of 32 people found this helpful
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I have had a bottle of coolant in my garage for a few years. Does it have a use by date?

3 years ago

Nulon coolants do have a shelf life. Nulon coolants that are green in colour have a shelf life of three years. Nulon coolants that are red in colour have a shelf life of five years.

44 of 47 people found this helpful
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Is distilled water suitable to add with Nulon coolants?

3 years ago

Yes it is suitable but often more expensive than demineralised or deionised water.

36 of 38 people found this helpful
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Is rain water suitable to add with Nulon coolants?

3 years ago

It is best to use deminalised or deionised water. Uncontaminated rain water is OK but if collected from roofs and gutters it can contain impurites which may affect coolant performance. Metal roofing materials, concrete roof tiles and tanks, dirt and dust, all contaminate rain water. These conatanimants have an adverse effect on your vehicle cooling system.

24 of 25 people found this helpful
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The coolant I purchased has changed colour in the bottle. Has it gone off ?

3 years ago

No, it is OK to use. Dye is added to coolant for identification purposes. The dye used to colour the coolant, green, red, etc can be affected by sunlight and age but this does not effect the performance of the coolant.

14 of 14 people found this helpful
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Is coolant poisonous?

3 years ago

Yes, coolants that contain ethylene glycol are poisonous. If ingested if affects the central nervous system and can cause death. Nulon adds a bittering agent to its coolants that contain ethylene glycol to prevent accidental ingestion from children or pets. Help can be sourced via Poisons Information Centre : Australia phone 131 126, New Zealand phone 0800 764 766

11 of 11 people found this helpful
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Do I need to use Radiator Flush and Clean in my cooling system?

3 years ago

While not essential we recommend using Radiator Flush and Clean to remove insulating built-up sludge and residue before changing coolant in any cooling system.

16 of 17 people found this helpful
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What is ethylene glycol?

3 years ago

Ethylene glycol is a product used in automotive coolants to give the coolant a lower freezing point and higher boiling point. This allows vehicles to operate in sub zero climates and also allows engine coolants to reach higher temperatues before boiling.

15 of 16 people found this helpful
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Can I mix different colour coolants?

3 years ago

No, coolant colour alone does not specify the chemical technology of the coolant. It is important to note that when coolants of different technology are mixed the performance is compromised.

34 of 43 people found this helpful
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What is the difference between soft, demineralised and deionised water?

3 years ago

Soft water, demineralised and deionised water are terms used to describe water which has low levels of dissolved mineral salts and ions of such metals as calcium, iron, or magnesium.

19 of 23 people found this helpful
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What is meant by Type A and Type B coolant?

3 years ago

In 1977 an Australian Standard was created to help regulate the quality and performance of automotive coolants in the Australian passenger car and light commercial market. The current standard is known as AS2108-2004. Type A coolants are antifreeze/antiboil coolants with corrosion inhibitor that comply with the requirements of this standard. Type B coolants are coolants with corrosion inhibitors only that comply with the requirements of this standard.

64 of 89 people found this helpful
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What ratio of coolant do I need?

3 years ago

This depends on the type of coolant your car requires and the climate extremes that your vehicle will operate in. Consult the Nulon Lube Guide for the suitable coolant type, consult your vehicle handbook and follow directions of use on label to determine the required ratio.

12 of 14 people found this helpful
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How do I change my coolant?

2 years ago

We show you how to change your vehicle's coolant in this easy step by step video. 

Nulon shows you how to change your vehicle's coolant in an easy step by step process. 
All you need to do this is: car jack, jack stands or ramps, screwdriver, socket or spanner, drain plug washer, oil drain pan, some rags, container for the used coolant, Gloves and Nulon Long Life Coolant.

14 of 17 people found this helpful
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Do you guarantee my cooling system wont corrode?

3 years ago

Using the correct type of coolant is essential. The Nulon Lube Guide can provide a guide to you coolant requirements. If directions of use are followed correctly Nulon coolants will protect the system from corrosion for the recommended life of the coolant.

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Why does my car need coolant?

3 years ago

Internal combustion engine generate large amounts of heat. "Coolant" simpy means a liquid that provides  temperature-transferring properties. In an automotive cooling system it is required to transfer heat from the engine whilst protecting the engine from corrosion (i.e. rust) and erosion which can be caused by fluid movement. Many automotive coolants also have added chemicals to extend the operating temperature range of the fluid. These are known as antifreeze/antiboil coolants.

3 of 3 people found this helpful
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What are IAT, OAT, HAT coolants?

3 years ago

These abbreviations refer to the technology used in the corrosion protection component of a coolant. IAT is Inorganic Additive Technology (often termed Conventional Technology), OAT is Organic Additive Technology, and HAT is Hybrid Additive Technology. To determine the best technology option and the preferred coolant for your car refer to the Nulon Lube Guide instore or online.

10 of 18 people found this helpful
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What type of coolant suits my car?

3 years ago

The best answer to this question can be found in the Nulon Lube Guide, also available in store.

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Where can I dispose of old coolant?

3 years ago

Contact your local waste facilities or environmental protection agency. Used coolants can contain environmentally unfriendly materials that have originated from the engine cooling system and need appropriate disposal. Do not drain used coolant onto the ground or into storm water.

7 of 20 people found this helpful
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