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10 Best radiator sealers in Canada
Best Choice01BlueDevil ProductsBlueDevil Radiator & Block Sealer
Main highlights- Works effectively on plastic, aluminum and/or metal radiators
- Safe and Easy to use.
- Permanent repair for radiator and block leaks.
- Guaranteed
- Contains no solids or fibrous materials.
9.8Exceptional
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- Curious about how we select the top products for you? Explore How It Works
- 02
GunkMotor Medic by Gunk C312 Radiator Sealer and Stop Leak - 11 oz.
Main highlights- Works fast to repair cooling system leaks
- Stands up to extreme heat, vibration and pressure
- Forms a tough durable seal that stands up to heat
- Compatible with all cooling system metals, hoses and gaskets
- A non-metallic liquid formula
9.7Exceptional
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Value for Money03K-SealK-Seal ST5516 HD Multi Purpose One Step Permanent Coolant Leak Repair
Main highlights- STOP HOLES & CRACKS: With 1 step our unique formula will seek out each hole & crack, permanently sealing them, without any adverse impact on the efficiency of your engine cooling
- Permanent coolant leak repair^Mixes with all antifreeze^No draining or flushing^Fixes cracks and leaks in radiator, head gasket, freeze plugs, cylinder heads, heater core, water pump casing and engine blocks^Just shake, pour and go
- PROFESSIONAL-GRADE RELIABILITY: Trusted by mechanics, our non-corrosive sealer delivers a durable & long-lasting repair, without clogging your cooling system. A cost-effective solution to engine coolant leaks, enhancing the reliability & performance of your vehicle’s cooling system. We've sold millions worldwide & are independently verified by university testing to meet ASTM D3147
- HEAVY DUTY PERFORMANCE: Engineered for large engines & industrial use; suitable for commercial or agricultural vehicles. A permanent repair for the lifetime of the engine. Compatible with all types of antifreeze coolant
- FIX IT FAST: Our multi-purpose solution works in minutes to quickly & permanently seal leaks in the radiator, head gasket, freeze plugs, block, heater matrix & water pump of heavy duty vehicles. Fixes most leaks in water-cooled engines
- EASY TO USE: K-Seal couldn't be simpler & requires no draining or flushing; just shake, pour & go - shake the bottle, add the fluid to your coolant system & run your engine as normal
9.6Exceptional
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- 04Bar's Leaks
Bar's Leaks PLT11 Pelletized Radiator Stop Leak - 11 oz.
Main highlights- Seals leaks
- Lubricates water pump seals
- Inhibits rust and corrosion
- Helps control electrolysis
- Conditions cooling system
9.5Excellent
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- 05IRONTITE
Irontite All Weather Seal, Blue, 16 oz
Main highlights- Works with All Types of Antifreeze: This versatile formula is compatible with traditional antifreeze, waterless antifreeze, and various proprietary coolant types, ensuring a perfect fit for any vehicle.
- Permanent Leak Sealant for Cooling Systems: Irontite All Weather Seal creates a permanent seal in head gaskets, radiators, heater cores, and other parts of the cooling system, effectively preventing leaks.
- No Sludge or Clogging: Unlike many other stop-leak products, All Weather Seal won’t cause sludge buildup or clog heater cores, maintaining the performance of your vehicle’s cooling system.
- Ideal for Preventative Maintenance: Perfect for everyday vehicles, commercial trucks, and heavy-duty machinery, this product is a great preventative measure to keep cooling systems leak-free and running smoothly.
- Easy to Use & Compatible with Multiple Materials: This formula is safe for use with aluminum, cast iron, steel, and plastic components, making it a reliable solution for various vehicle types and cooling systems.
- Activates with Heat & Air: Once added, All Weather Seal activates when the cooling system reaches operating temperature, efficiently sealing leaks without interrupting the flow of coolant.
9.4Excellent
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- 06JB Weld
Radiator & Plastic Tank Repair Kit-Carded Repair Kit
26% OffMain highlights- Radiator & Plastic Tank Repair Kit-Carded Repair Kit
9.3Excellent
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- 07Liqui Moly
Liqui Moly Radiator Stop Leak – 250 ml Cooling System Leak Sealer, Quickly Seals Hairline Cracks, Porous Joints & Small Radiator Leaks, Compatible with Aluminum Radiators
Main highlights- Universal Compatibility
- Safe for Radiators & Water Pump System
- Protects Engine & Head Gasket Integrity
- Preventive & Maintenance Use
- Fast Cooling System Leak Repair
9.1Excellent
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- 08
Prestone
Prestone AS145 Radiator Sealer Stop Leak - 11 oz.
Main highlights- Stops the leak as well as the corrosive condition that causes it
- Seals even large leaks without interfering with the flow through the radiator or heater core
- Patented formula quickly stops leaks in radiators, water pumps, and heater cores
- Combination of natural and synthetic components provides the ability to seal leaks up to 0.020" x 0.5"
- Boosts corrosion inhibitors to protect against pitting and corrosion, which cause radiator leaks
8.8Very Good
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- 09Astibym
Aluminium Alloy Radiator Weld On Filler Neck with 1.1bar Cap for Vehicle Modification,Radiators and accessories
Main highlights- and - Made of high strength aluminium alloy, this filler neck is resistant to high temperature and rusting, ensuring long-lasting stability.
- [Versatile Application] - Compatible with a wide range of vehicles, making it ideal for car enthusiasts and vehicle modifications.
- [Secure Sealing] - Equipped with a 1.1bar radiator cap, ensuring a tight seal and preventing coolant leakage for efficient cooling system
- [Easy Installation] - Features a weld-on design for easy installation in vehicle modification projects.
- [Easy Coolant Addition] - Allows for easy addition of coolant to the vehicle's cooling system, ensuring the engine's normal
8.6Very Good
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- 10CosWarm
CosWarm CW4 Central Heating Leak Sealer – Treats Up To 18 Single Radiators – Leak Seal & Stop – Radiator & Boiler Leak Sealant - Stops Minor Leaks & Weeps, Fixes Pressure Loss & Leaking Pipes In Hydronic Heating Systems
27% OffMain highlights- SUPER CONCENTRATED FORMULA: Our boiler and central heating system leak sealer can treat up to 18 single radiators i.e., a 150-liter system. It is easy to use, just pour it in the system according to the instructions and let it work.
- STOPS SMALL LEAKS & FIXES PRESSURE LOSS: CW4 Leak Sealer seals all the small and inaccessible leaks, thus saving time and money in draining down and repairing cost. Our boiler leak sealant also helps in fixing pressure loss due to minor leaks from central heating systems.
- SAFE FOR YOU, THE BOILERS & THE ENVIRONMENT: Our non-toxic leak sealant is a safer alternative compared to other toxic, chemical formulas. As it is biodegradable, it won’t harm Mother Nature either. Safe to use around people, the environment and your heating systems.
- HARMLESS FOR METALS: There are many leak sealer chemicals that are not friendly when they come into contact with metals. CW4 Leak Sealer liquid is suitable for use with all the metals and materials, including steel, ferrous metals, copper and aluminum.
- CONVENIENCE AT ITS BEST: Our leak sealer and stopper makes minor repairs in the boiler a breeze. It does not interfere with the working of your central heating systems and you won’t have to shut down the systems before or while using it. The product can be left in the system permanently.
8.3Good
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