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Editor's Choice
K-Seal ST5501 Multi-Purpose One Step Permanent Coolant Leak Repair
K-SEALBrand
ST5501Model
2.36H*3.11L*0.79W inchesDimension
0.6 lbWeight
Ranked #10 in Best Transmission Leak Sealer Of 2024
9.7We rank the products based on several factors, like features, price, customer reviews, and so on.
Rating: Excellent
Price: $$
Save 17% + FreeShipping
Visit Store » Amazon.com ( 4.68 / 5 )
Features
- 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. Fixes most leaks in water-cooled engines
- STOP HOLES & CRACKS - With just 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
- EASY TO USE - K-Seal couldn't be simpler to use & requires no draining or flushing; just shake, pour & go - shake the bottle, add the fluid to your coolant system & run your engine as normal
- VERSATILE COMPATIBILITY - Compatible with all types of antifreeze coolant. Suitable for use in both cars & light trucks with up to 12 cylinders. A permanent repair for the lifetime of the engine
- PROFESSIONAL-GRADE RELIABILITY - Trusted by mechanics, our sealer delivers a durable & long-lasting repair. A cost-effective solution to engine coolant leaks, enhancing the reliability & performance of your vehicles cooling system. We've sold millions worldwide & are independently verified by university testing to meet ASTM D3147
2
Editor's Choice
Bar'S Leaks 1186 Liquid Aluminum Stop Leak
BAR'S LEAKSBrand
1186Model
6.6H*1.8L*3.0W inchesDimension
0.8 lbWeight
9.6We rank the products based on several factors, like features, price, customer reviews, and so on.
Rating: Excellent
Price: $
Save 13% + FreeShipping
Visit Store » Amazon.com ( 4.68 / 5 )
Features
3
Editor's Choice
Bar'S Leaks 1109 Block Seal Liquid Copper Intake And Radiator Stop Leak
BAR'S LEAKSBrand
1109Model
2.6H*7.5L*2.6W inchesDimension
1.12 lbWeight
9.3We rank the products based on several factors, like features, price, customer reviews, and so on.
Rating: Excellent
Price: $
FreeShipping
Visit Store » Amazon.com ( 4.68 / 5 )
Features
- PERMANENTLY FIXES COOLING SYSTEM LEAKS - . One step formula permanently repairs coolant loss problems on cars, trucks, vans, SUVs and RVs.
- ANTIFREEZE COMPATIBLE - NO DRAINING REQUIRED - Antifreeze compatible sodium silicate liquid glass penetrates large and small leaks in plastic, aluminum and cast iron heads, blocks, intake manifold & gaskets, freeze plugs, heater cores and radiators.
- ONE STEP - POUR DIRECTLY INTO RADIATOR - EASY TO USE - Fiber additives lock together with liquid to increase strength and promote a permanent seal. It will not harm the coolingsystem when used properly, no draining is required.
- USE WITH ALL TYPES OF TRADITIONAL OR EXTENDED LIFE COOLANT - Use with ALL types of traditional or extended life coolant including yellow, orange, pink, red, blue, purple and green silicate based & non-silicate based (OAT/HOAT) 50-50 mix antifreeze, and/or water.
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Bar'S Leaks HDC Radiator Stop Leak Tablet
BAR'S LEAKSBrand
HDCModel
0.8H*7.5L*5.0W inchesDimension
0.2 lbWeight
9.1We rank the products based on several factors, like features, price, customer reviews, and so on.
Rating: Excellent
Price: $
FreeShipping
Visit Store » Amazon.com ( 4.68 / 5 )
Features
5
K-Seal ST5516 Heavy-Duty Multi-Purpose One Step Permanent Coolant Leak Repair
K-SEALBrand
ST5516Model
1.9H*5.9L*4.1W inchesDimension
Ranked #17 in Best Head Gasket Sealers Of 2024
9.0We rank the products based on several factors, like features, price, customer reviews, and so on.
Rating: Very Good
Price: $$$
FreeShipping
Visit Store » VerSure ( 4.92 / 5 )
Features
- 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
- 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
- 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
- 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
- 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 vehicles cooling system. We've sold millions worldwide & are independently verified by university testing to meet ASTM D3147
6
Bar'S Leaks PLT11 Pelletized Hd Radiator Stop Leak
BAR'S LEAKSBrand
PLT11Model
6.0H*3.0L*3.0W inchesDimension
0.69 lbWeight
9.0We rank the products based on several factors, like features, price, customer reviews, and so on.
Rating: Very Good
Price: $
FreeShipping
Visit Store » Amazon.com ( 4.68 / 5 )
Features
7
Super Glue 62020 Instant Gas Tank And Radiator Repair
SUPER GLUEBrand
62020Model
0.4H*5.8L*3.5W inchesDimension
0.04 lbWeight
8.9We rank the products based on several factors, like features, price, customer reviews, and so on.
Rating: Very Good
Price: $
FreeShipping
Visit Store » Amazon.com ( 4.68 / 5 )
Features
8
J-B Weld 2120 Radiator Repair Kit
J-B WELDBrand
2120Model
8.0H*2.0L*4.0W inchesDimension
0.11 lbWeight
8.7We rank the products based on several factors, like features, price, customer reviews, and so on.
Rating: Very Good
Price: $$
Save 20% + FreeShipping
Visit Store » Amazon.com ( 4.68 / 5 )
Features
- RADIATORWELD - Our radiator and plastic tank repair kit has all you need for making professional quality, permanent repairs with state of the art components and easy to follow instructions.
- COUNT ON US - For more than 40 years, our products have earned a loyal following from people who take pride in their work. With each product we innovate, we continue to provide the world's strongest bond for your projects.
- SIMPLE TO USE - No removal of tank or radiator is required to stop leaks. Easily fix holes up to 3/8 inch diam. or cracks up to 4 inch long. Includes epoxy putty, fiberglass cloth, sandpaper, and applicator.
- VERSATILE & DEPENDABLE - Great for radiators, washer fluid tanks, storage tanks, water tanks, plastics, composites, PVC and more. Professionals, mechanics and avid DIYers know J-B gets the job done.
- NO PROJECT TOO BIG OR TOO SMALL - We have all the products you need to get the job done right. JB Weld always delivers the legendary performance of the World's Strongest Bond.
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Crc 401016 Block Seal Permanent Metallic™ Block & Radiator Seal
CRCBrand
401016Model
2.13H*5.87L*2.31W inchesDimension
1.15 lbWeight
8.7We rank the products based on several factors, like features, price, customer reviews, and so on.
Rating: Very Good
Price: $$
FreeShipping
Visit Store » Amazon.com ( 4.68 / 5 )
Features
- Permanent molecular seal thats as strong as steel
- Seals cracks & holes in cast iron and aluminum engine blocks, head gaskets, freeze plugs, and copper, aluminum and bi-material radiators & heater cores
- For use in all water-cooled diesel and gasoline vehicles
- Withstands extreme pressure and temperatures of a cooling system and will not wash away
- Professional grade formula exceeds ASTM D6107 for effectively sealing leaks in cooling systems
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Generic ASBP Radiator Stop Leak Sealer Conditioner
GENERICBrand
ASBPModel
1.18H*1.97L*0.39W inchesDimension
0.04 lbWeight
8.7We rank the products based on several factors, like features, price, customer reviews, and so on.
Rating: Very Good
Price: $$$
Visit Store » RxAuto ( 5.0 / 5 )
Features
- PEACE OF MIND ON EVERY DRIVE - Engineered by automobile and chemistry experts, this Radiator Stop Leak Sealer ensures your car's cooling system runs smoothly. Safe for all metals, plastics, and rubbers, it's the guardian your radiator needs.
- QUICK FIX, LASTING RESULTS - Say goodbye to cooling system woes with this easy-to-use tube solution. Its patented formula works rapidly to halt radiator and heater core leaks, ensuring a reliable, long-lasting repair.
- MAINTENANCE MADE SIMPLE - Compatible with all antifreeze types, this Leak Sealer Conditioner not only stops leaks but prevents rust and lubricates the water pump. A true all-rounder for your car care routine. ADD TO CART now.
- COST-EFFECTIVE COOLING CONFIDENCE - Why pay for expensive repairs? Our Radiator Sealant offers an affordable solution to prevent and repair cooling system damage, saving you time and money.
- EVERY JOURNEY, LEAK-FREE - Enjoy worry-free travels with our Radiator Stop Leak Sealer. Designed to seal most cooling system leaks effortlessly, it's the trusty co-pilot for every road trip, commute, or adventure.
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Parts Express 4S09-17100051 Dike Radiator Stop Leak
PARTS EXPRESSBrand
4S09-17100051Model
8.6We rank the products based on several factors, like features, price, customer reviews, and so on.
Rating: Very Good
Price: $$$
Save 26%
Visit Store » BestFit Truck Parts ( 4.5 / 5 )
Features
- Stops Leaks In Radiators In Seconds Helps Gaskets
- Works With All Standard And Permanent Antifreezes
- Preventing Antifreeze And Water From Seeping Into The Engine
- Will Not Block Small Passages In The Cooling System
- Keep Dike In Your Vehicle Emergency Kit For On-The-Spot Repairs Or As a Preventative Measure For Vehicles Operating Under Severe Conditions. Add One Pint To Every Four Gallons Of Coolant Or Water.
- WHAT'S INCLUDED - (1) Pint of Dike Radiator Stop Leak
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Generic MBH1 Mr. Blockhead Permanent Block & Radiator Sealer
GENERICBrand
MBH1Model
8.5H*8.5L*2.5W inchesDimension
1.5 lbWeight
8.6We rank the products based on several factors, like features, price, customer reviews, and so on.
Rating: Very Good
Price: $$
Visit Store » Entek The Original Smokeless Oil ( 5.0 / 5 )
Features
13
Acdelco 10-108 12378255) Cooling System Sealing Tabs
ACDELCOBrand
10-108Model
0.0H*0.0L*0.0W inchesDimension
8.6We rank the products based on several factors, like features, price, customer reviews, and so on.
Rating: Very Good
Price: $
Save 13% + FreeShipping
Visit Store » G.P.S. ( 4.92 / 5 )
Features
- Engineered for use on a variety of engine components - effective on - oil pan, ladder frame, front and rear covers, t-joints, manifold corners, intake, manifold end seals, and cam covers
- Designed for quick and easy application, assembly may be filled with oil or coolant immediately after applying sealant and torqueing the bolts
- High viscosity product that cures when exposed to air
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Liqui Moly 20132 Radiator Stop Leak | 250 Ml
LIQUI MOLYBrand
20132Model
0.0H*0.0L*0.0W inchesDimension
0.7 lbWeight
8.4We rank the products based on several factors, like features, price, customer reviews, and so on.
Rating: Very Good
Price: $$
FreeShipping
Visit Store » Amazon.com ( 4.68 / 5 )
Features
- LIQUI MOLY Radiator Stop-Leak completely seals such leaks immediately with ease
- Secures the combustion chamber from damages caused by coolant admission
- For all cooling water and heating systems with and without water filters
- LIQUI MOLY Radiator Stop-Leak completely seals such leaks immediately with ease
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Prestone AS145 Stop Leak Repair For Radiators
PRESTONEBrand
AS145Model
5.64H*1.91L*3.04W inchesDimension
0.8 lbWeight
8.4We rank the products based on several factors, like features, price, customer reviews, and so on.
Rating: Very Good
Price: $$$
FreeShipping
Visit Store » Home and Country USA ( 4.66 / 5 )
Features
- Patented formula quickly stops leaks in radiators, water pumps, and heater cores
- Boosts corrosion inhibitors to protect against pitting and corrosion, which cause radiator leaks
- Combination of natural and synthetic components provides the ability to seal leaks up to 0.020 inch x 0.5 inch
- Seals even large leaks without interfering with the flow through the radiator or heater core
- Stops the leak as well as the corrosive condition that causes it
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Bar'S Leaks 1196 Radiator Stop Leak - 11 Oz.
BAR'S LEAKSBrand
1196Model
5.0H*1.6L*2.4W inchesDimension
0.5 lbWeight
8.2We rank the products based on several factors, like features, price, customer reviews, and so on.
Rating: Very Good
Price: $
FreeShipping
Visit Store » G.P.S. ( 4.92 / 5 )
Features
- STOPS & SEALS COOLANT LEAKS - Specially designed to stop minor cooling system leaks and drips caused by normal cooling system wear and age.
- SEALS LEAKS IN RADIATORS, GASKETS, HEATER CORES & FREEZE PLUGS - Use one bottle for regular size cooling systems; this covers most 6 and 8 cylinder passenger vehicles and light trucks. Use 1/2 bottle for four cylinder engines.
- WORKS WITH ALL TYPES AND COLORS OF ANTIFREEZE COOLANT AND / OR WATER - Including yellow, orange, pink, red, blue, purple and green silicate based & non-silicate based (OAT/HOAT) 50-50 mix antifreeze, and/or water.
- Works with all types and colors of anti-freeze coolant
- Stops and seals coolant leaks
- One bottle treats up to 4 gallons
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Visbella 0040 Radiator Stop Leak Sealer Conditioner Radiator Repair Kit Car Heater Core
VISBELLABrand
0040Model
8.1We rank the products based on several factors, like features, price, customer reviews, and so on.
Rating: Very Good
Price: $
FreeShipping
Visit Store » GNT Direct ( 4.75 / 5 )
Features
- Engineered by automobile and chemistry experts, this Radiator Stop Leak Sealer ensures your car's cooling system runs smoothly
- Safe for all metals, plastics, rubbers, aluminum, hoses and connections, it's the guardian your radiator needs
- Compatible with all antifreeze types, this Leak Sealer Conditioner not only stops leaks but prevents rust and lubricates the water pump
- Our Radiator Sealant offers an affordable solution to prevent and repair cooling system damage, saving you time and money
- One step formula - pour directly into radiator- permanently repairs coolant loss problems on cars, bus, trucks, vans, SUVs and RVs
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Bluedevil Products 00205 Radiator & Block Sealer
BLUEDEVIL PRODUCTSBrand
00205Model
7.25H*2.75L*2.75W inchesDimension
1.0 lbWeight
7.9We rank the products based on several factors, like features, price, customer reviews, and so on.
Rating: Good
Price: $$$
Visit Store » AutoParts Kingdom ( 4.48 / 5 )
Features
19
Niteo C312 Radiator Sealer And Stop Leak
NITEOBrand
C312Model
5.7H*2.8L*2.8W inchesDimension
0.9 lbWeight
7.8We rank the products based on several factors, like features, price, customer reviews, and so on.
Rating: Good
Price: $
FreeShipping
Visit Store » G.P.S. ( 4.92 / 5 )
Features
- MOTOR MEDIC is a local family owned company based out of Charlotte, NC. For more than 75 years, LIQUID WRENCH products, developed by the people who use them, has earned the trust of hard-working tradesment and the active DIYer through consistent, superior performance and a commitment to innovation.MOTOR MEDIC
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Gold Eagle ASLC16 Radiator Stop Leak And Conditioner Liquid
GOLD EAGLEBrand
ASLC16Model
8.25H*4.0L*1.75W inchesDimension
0.55 lbWeight
7.6We rank the products based on several factors, like features, price, customer reviews, and so on.
Rating: Good
Price: $$$
Visit Store » TeknologyPark ( 4.65 / 5 )
Features