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Radiator Additives


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Penrite Radiator Flush Additive 375mL - ADRF375

Penrite Radiator Flush Additive 375mL - ADRF375

$27
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Nulon Permanent Head Gasket Repair 750ml - PHGR-750

Nulon Permanent Head Gasket Repair 750ml - PHGR-750

$95
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Holts Wondarweld Cooling System Repair 250ml - HREP0062A

Holts Wondarweld Cooling System Repair 250ml - HREP0062A

$22
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Nulon Radiator Flush & Clean 300mL - R40

Nulon Radiator Flush & Clean 300mL - R40

$25
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Rislone Head Gasket Fix 680g - 41111

Rislone Head Gasket Fix 680g - 41111

$99
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K-SEAL Ultimate Head Gasket Repair - K3501

K-SEAL Ultimate Head Gasket Repair - K3501

$96
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Rislone Radiator Stop Leak 325mL - 41196

Rislone Radiator Stop Leak 325mL - 41196

$18
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Penrite Radiator Stop Leak 375mL - ADRSL375

Penrite Radiator Stop Leak 375mL - ADRSL375

$30
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One Shot Radiator Stop Leak - 20050

One Shot Radiator Stop Leak - 20050

$9
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Nulon Radiator Stop Leak 300mL - R50

Nulon Radiator Stop Leak 300mL - R50

$19
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Irontite Coolant System Sealer 600g - 960101

Irontite Coolant System Sealer 600g - 960101

$60
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Rislone Aluminium Radiator Stop Leak 479g - 41186

Rislone Aluminium Radiator Stop Leak 479g - 41186

$30
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Sealwell Coolant System Conditioner 2 Pack - T51012

Sealwell Coolant System Conditioner 2 Pack - T51012

$22
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Wynn's Radiator Flush 325mL - 65332

Wynn's Radiator Flush 325mL - 65332

$32
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CRC Fibre Lock 946ml - 1224
CRC

CRC Fibre Lock 946ml - 1224

$108
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Rislone Super Radiator Flush 650mL - 41201

Rislone Super Radiator Flush 650mL - 41201

$22
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Repco Cooling System Flush 500ml - RCOOLFLUSH500
Clearance

Repco Cooling System Flush 500ml - RCOOLFLUSH500

$5
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Repco Radiator Stop Leak 500ml - RRADSTOP500
Clearance

Repco Radiator Stop Leak 500ml - RRADSTOP500

$5
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Bar's Leaks Radiator Stop Leak 150g - 001508
Clearance

Bar's Leaks Radiator Stop Leak 150g - 001508

$8
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Tectaloy Mukowt Radiator Flush 500mL - TE610
Clearance

Tectaloy Mukowt Radiator Flush 500mL - TE610

$5
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Showing 1 - 26 of 26 products

Repco is your home of Radiator Additives

Radiator additives play an essential role in maintaining the health and functionality of a vehicle's cooling system. From preventing leaks to reducing corrosion, these products are designed to address specific issues and improve overall performance. Repco have the right head gasket repair, radiator stop leak or coolant flush additives suited to your needs and your vehicle. Find the best radiator additives from Bars Leaks, CRC, Rislone, Tectaloy and more at your local Repco store.

Below is a short guide that explores the most common types of radiator additives, their purposes, and how they can benefit your vehicle.

Radiator Stop Leak Additives

Stop leak additives are designed to seal small leaks in a vehicle's cooling system. These products work by circulating through the radiator and other components, where they identify and seal minor cracks or holes. Stop leak additives are particularly useful for temporary fixes, allowing drivers to get to a mechanic without risking further damage.

While these additives can be effective, they are not a permanent solution for major issues. Overuse or reliance on stop leak products may lead to clogs in the cooling system, which can reduce efficiency. It is always advisable to inspect the cooling system thoroughly after using a stop leak additive to ensure no underlying problems persist.

Head Gasket Repair Additives

Head gasket repair additives are formulated to address leaks in the head gasket, which is a critical component of the engine. These products often use a combination of fibres, chemicals, and sealants to create a durable bond that can withstand high temperatures and pressures within the engine.

Head gasket repair additives can be a cost-effective alternative to a full gasket replacement, particularly for older vehicles or those with minor leaks. However, they are not a guaranteed solution for severe damage. If a head gasket failure is extensive, professional repairs will likely be necessary. You should always follow the product instructions carefully to avoid complications during application.

Coolant Flush Additives

Coolant flush additives are used to clean a vehicle's cooling system by removing rust, scale, and other contaminants that can accumulate over time. These products are typically added to the coolant before a flush, allowing the solution to break down deposits and debris effectively.

Regular use of coolant flush additives can help maintain the efficiency of the radiator and prevent overheating. They are particularly beneficial for older vehicles or those that have not had a cooling system service in a while. After using a coolant flush additive, it is essential to replace the old coolant with fresh fluid to ensure optimal performance and protection.

Corrosion Inhibitors

Corrosion inhibitors are additives designed to protect the cooling system from rust and corrosion. These products work by forming a protective barrier on metal surfaces, preventing the chemical reactions that lead to deterioration. Corrosion inhibitors are often included in modern coolant formulations, but they can also be purchased as standalone products for additional protection.

Using corrosion inhibitors is particularly important for vehicles operating in harsh environments or those with older cooling systems. Regular application can extend the lifespan of the radiator and other components, reducing the likelihood of costly repairs. Drivers should ensure they use a product compatible with their vehicle's cooling system to avoid unwanted reactions or damage.

Choosing the Right Additive

When selecting a radiator additive, it is crucial to consider the specific needs of the vehicle and the nature of the problem. Not all cooling system additives are suitable for every situation, and using the wrong product can sometimes do more harm than good. Reading the product label and consulting the vehicle's manual can help ensure compatibility.

It is also worth noting that radiator additives are not a substitute for regular maintenance. While they can provide temporary solutions and additional protection, a well-maintained cooling system is the best defence against leaks, corrosion, and other issues. Drivers should schedule routine inspections and flushes to keep their cooling system in top condition.

Key Considerations for Use

Before using any radiator additive, it is important to follow the manufacturer's instructions carefully. Overuse or incorrect application can lead to clogs, reduced efficiency, or even damage to the cooling system. Additionally, additives should always be used as part of a broader maintenance plan rather than a standalone solution.

Drivers should also be mindful of environmental regulations when disposing of old coolant or additives. Many of these products contain chemicals that can be harmful if not handled properly. Recycling centres or automotive service providers can often assist with safe disposal.

Repco are your home of quality additives for your vehicle

It's not just your cooling system we take care of, our range of additives cover any of the vital systems on your vehicle. From quality fuel treaments we have a huge range of additives to optimise, enhance or repair.