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Best Radiator Sealers - Buying Guide

Last Updated: 05/09/2024

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  #1

Bar's Leaks HDC Radiator Stop Leak Tablet - 60 Grams, Brown

Asin: B000KKND3Q   |   Model: HDC   |   PartNumber: HDC   |   Ean: 7258006523747, 7262318464667, 0046087000069   |   UPC: 046087000069

Features

  • Seals leaks
  • Conditions cooling system
  • Inhibits rust and corrosion
  • Lubricates water pump seals
  • Helps control electrolysis
  • See more on Amazon...

Inhibits Rust And Corrosion.
Helps Control Electrolysis.
Lubricates Water Pump Seals.
Conditions Cooling System.

First Available: 12/02/2011

Brand: Bar's Leaks   |   Manufacturer: Bar's Leaks

Dimensions: 0.80 x 7.50 x 5.00 Inches   |   Weight: 0.10 Pounds

Warranty: Manufacturer Warranty

Amazon Price: $2.99 ($1.42 / Ounce) | as of 05/09/2024 (3:21am pst) *DETAILS
Availability: In Stock
List Price: $4.07 ($1.93 / Ounce)

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  #2

K-Seal ST5501 Multi-Purpose One Step Permanent Coolant Leak Repair, 8oz, Pour and Go, Mixes with All Antifreeze, No Flushing Required

Asin: B001QT9KO6   |   Model: ST5501   |   PartNumber: ST5501   |   Ean: 0812646010004, 5060002968017, 7262318311480   |   UPC: 812646010004

Features

  • Permanent Coolant Leak Repair: K-Seal s unique formula will seek out holes and cracks, and permanently seal them, with no adverse impact on the efficiency of your engine cooling.
  • Versatile Usage: Fixes cracks and leaks in the radiator, head gasket, freeze plugs, cylinder heads, heater core, water pump casing and engine blocks
  • Universal Solution: This coolant stop leak is universally applicable. It can be used with all types of antifreeze, making K-Seal an essential tool for any vehicle owner
  • No Draining or Flushing: K-Seal coolant leak repair is easy to use. It eliminates the need for draining or flushing, making it a convenient solution. Just shake, pour and go.
  • Effective Cooling: The K-Seal 8 fluid ounce bottle is effective up to 20 quarts of cooling capacity
  • See more on Amazon...

Universal Solution: This Coolant Stop Leak Is Universally Applicable. It Can Be Used With All Types Of Antifreeze, Making K-Seal An Essential Tool For Any Vehicle Owner.
Effective Cooling: The K-Seal 8 Fluid Ounce Bottle Is Effective Up To 20 Quarts Of Cooling Capacity.
No Draining Or Flushing: K-Seal Coolant Leak Repair Is Easy To Use. It Eliminates The Need For Draining Or Flushing, Making It A Convenient Solution. Just Shake, Pour And Go..
Versatile Usage: Fixes Cracks And Leaks In The Radiator, Head Gasket, Freeze Plugs, Cylinder Heads, Heater Core, Water Pump Casing And Engine Blocks.

Brand: K-Seal   |   Manufacturer: Solv-Tec

Dimensions: 6.00 x 7.87 x 2.00 Inches   |   Weight: 0.60 Pounds

Warranty: When K-Seal makes a repair we guarantee it will be permanent

Amazon Price: $11.69 | as of 05/09/2024 (3:21am pst) *DETAILS
Availability: In Stock
List Price: $14.99

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  #3

Bar's Leaks 1109 Block Seal Liquid Copper Intake and Radiator Stop Leak - 18 oz.

Asin: B002PX91OG   |   Model: 1109   |   PartNumber: 1109   |   Ean: 0046087011096   |   UPC: 046087011096

Features

  • PERMANENTLY FIXES COOLING SYSTEM LEAKS: . One step formula permanently repairs coolant loss problems on cars, trucks, vans, SUV s and RV s.
  • 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.
  • See more on Amazon...

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..
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..

Brand: Bar's Leaks   |   Manufacturer: Bar's Leaks

Dimensions: 2.60 x 7.50 x 2.60 inches   |   Weight: 1.13 pounds

Amazon Price: $7.97 | as of 05/09/2024 (3:21am pst) *DETAILS
Availability: In Stock

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  #4

Super Glue Pro Seal N62020 Instant Gas Tank and Radiator Repair

Asin: B001JT5OSO   |   Model: N62020   |   PartNumber: N62020   |   Ean: 0050291620203   |   UPC: 050291620203

Features

  • Instant Gas Tank and Radiator Repair
  • 0.7-Ounce strip
  • Easy to use putty
  • Permanently seals cracks and split seams
  • Hardens like steel
  • See more on Amazon...

Easy To Use Putty.
Hardens Like Steel.
Permanently Seals Cracks And Split Seams.
0.7-Ounce Strip.

Brand: Super Glue   |   Manufacturer: Super Glue

Dimensions: 0.40 x 5.80 x 3.50 Inches   |   Weight: 0.04 Pounds

Amazon Price: $4.87 ($6.96 / Ounce) | as of 05/09/2024 (3:21am pst) *DETAILS
Availability: In Stock

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  #5

J-B Weld 2120 Radiator Repair Kit

Asin: B01IOPE66G   |   Model: 2120   |   PartNumber: 2120   |   Ean: 0043425021205   |   UPC: 043425021205

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 diam. or cracks up to 4 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.
  • See more on Amazon...

Simple To Use: No Removal Of Tank Or Radiator Is Required To Stop Leaks. Easily Fix Holes Up To 3/8" Diam. Or Cracks Up To 4" Long. Includes Epoxy Putty, Fiberglass Cloth, Sandpaper, And Applicator..
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..
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..
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..

First Available: 07/18/2016

Brand: J-B Weld   |   Manufacturer: JBWeld

Dimensions: 8.00 x 2.00 x 4.00 inches   |   Weight: 0.11 Pounds

Warranty: As Labelled

Amazon Price: $11.94 | as of 05/09/2024 (3:21am pst) *DETAILS
Availability: In Stock
List Price: $14.99

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  #6

Bar's Leaks 1186 Liquid Aluminum Stop Leak - 16.9 oz

Asin: B002696FA2   |   Model: 1186   |   PartNumber: 1186   |   Ean: 0713976297632, 0046087011867   |   UPC: 046087011867, 713976297632

Features

  • Repairs gasket leaks
  • Bar's Leaks Liquid Aluminum Stop Leak seals radiator leaks; Seals freeze plug leaks; Repairs gasket leaks and heater core leaks; Lowers water temperature
  • Seals freeze plug leaks
  • Seals radiator leaks
  • See more on Amazon...

Seals Freeze Plug Leaks.
Seals Radiator Leaks.
Bar's Leaks Liquid Aluminum Stop Leak Seals Radiator Leaks; Seals Freeze Plug Leaks; Repairs Gasket Leaks And Heater Core Leaks; Lowers Water Temperature.

First Available: 07/16/2012

Brand: Bar's Leaks   |   Manufacturer: Bar's Leaks

Dimensions: 6.60 x 1.80 x 3.00 Inches   |   Weight: 0.80 pounds

Warranty: No

Amazon Price: $6.95 | as of 05/09/2024 (3:21am pst) *DETAILS
Availability: In Stock
List Price: $8.48

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  #7

CRC K&W 401016 Block Seal Permanent Metallic Block & Radiator Seal - 16 Oz

Asin: B000CIPV5E   |   Model: 401016   |   PartNumber: 401016   |   Ean: 0078372010163   |   UPC: 078372010163

Features

  • Permanent molecular seal that s 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
  • See more on Amazon...

For Use In All Water-Cooled Diesel And Gasoline Vehicles.
Professional Grade Formula Exceeds Astm D6107 For Effectively Sealing Leaks In Cooling Systems.
Withstands Extreme Pressure And Temperatures Of A Cooling System And Will Not Wash Away.
Seals Cracks & Holes In Cast Iron And Aluminum Engine Blocks, Head Gaskets, Freeze Plugs, And Copper, Aluminum And Bi-Material Radiators & Heater Cores.

First Available: 02/08/2018

Brand: CRC   |   Manufacturer: CRC

Dimensions: 2.13 x 5.87 x 2.31 inches   |   Weight: 1.15 pounds

Warranty: limited warranty

Amazon Price: $16.20 | as of 05/09/2024 (3:21am pst) *DETAILS
Availability: In Stock

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  #8

K-Seal ST5516 Heavy-Duty Multi-Purpose One Step Permanent Coolant Leak Repair, 8oz, Pour and Go, Mixes with All Antifreeze, No Flushing Required

Asin: B002BJEG3U   |   Model: ST5516HD   |   PartNumber: ST5516HD   |   Ean: 0812646010066   |   UPC: 812646010066

Features

  • Permanent Coolant Leak Repair: K-Seal s unique formula will seek out holes and cracks, and permanently seal them, with no adverse impact on the efficiency of your engine cooling.
  • Versatile Usage: Fixes cracks and leaks in the radiator, head gasket, freeze plugs, cylinder heads, heater core, water pump casing and engine blocks
  • Heavy-Duty Universal Solution: This coolant stop leak was designed specifically for HGVs, tractors, heavy plant and other commercial vehicles. It can be used with all types of antifreeze
  • No Draining or Flushing: K-Seal coolant leak repair is easy to use. It eliminates the need for draining or flushing, making it a convenient solution. Just shake, pour and go.
  • Effective Cooling: The K-Seal 16 fluid ounce bottle is effective up to 40 quarts of cooling capacity
  • See more on Amazon...

Heavy-Duty Universal Solution: This Coolant Stop Leak Was Designed Specifically For Hgvs, Tractors, Heavy Plant And Other Commercial Vehicles. It Can Be Used With All Types Of Antifreeze.
Effective Cooling: The K-Seal 16 Fluid Ounce Bottle Is Effective Up To 40 Quarts Of Cooling Capacity.
No Draining Or Flushing: K-Seal Coolant Leak Repair Is Easy To Use. It Eliminates The Need For Draining Or Flushing, Making It A Convenient Solution. Just Shake, Pour And Go..
Versatile Usage: Fixes Cracks And Leaks In The Radiator, Head Gasket, Freeze Plugs, Cylinder Heads, Heater Core, Water Pump Casing And Engine Blocks.

Brand: K-Seal   |   Manufacturer: Solv-Tec

Dimensions: 1.90 x 5.90 x 4.10 Inches   |   Weight: 1.19 pounds

Amazon Price: $19.57 | as of 05/09/2024 (3:21am pst) *DETAILS
Availability: In Stock
List Price: $20.97

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  #9

Prestone AS145 Stop Leak Repair for Radiators, Heater Cores, and Hoses, 11 oz., 1 Pack

Asin: B00B99U1V4   |   Model: AS145   |   PartNumber: AS145   |   Ean: 0797496876546   |   UPC: 797496876546

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 x 0.5
  • 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
  • See more on Amazon...

Combination Of Natural And Synthetic Components Provides The Ability To Seal Leaks Up To 0.020" X 0.5".
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.
Boosts Corrosion Inhibitors To Protect Against Pitting And Corrosion, Which Cause Radiator Leaks.

First Available: 02/01/2013

Brand: Prestone   |   Manufacturer: Prestone

Dimensions: 5.64 x 1.91 x 3.04 Inches   |   Weight: 0.80 Pounds

Amazon Price: $5.95 ($0.54 / Ounce) | as of 05/09/2024 (3:21am pst) *DETAILS
Availability: In Stock

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  #10

Mr. Blockhead Permanent Block & Radiator Sealer

Asin: B0CNTXBH4L   |   Model: BLOCKHEAD   |   PartNumber: BLOCKHEAD

Features

Head Gaskets.
Heater Cores.
Freeze Plugs.
Cylinder Heads.
Radiators.

Brand: Generic   |   Manufacturer: Entek Corporation

Dimensions: 8.50 x 8.50 x 2.50 Inches   |   Weight: 1.50 pounds

Amazon Price: $15.00 | as of 05/09/2024 (3:21am pst) *DETAILS
Availability: In Stock

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  #11

Bar's Leaks PLT11 Pelletized HD Radiator Stop Leak - 11 oz.

Asin: B000CNN304   |   Model: PLT11   |   PartNumber: PLT11   |   Ean: 0046087000472   |   UPC: 046087000472

Features

  • Seals leaks
  • Conditions cooling system
  • Inhibits rust and corrosion
  • Lubricates water pump seals
  • Helps control electrolysis
  • See more on Amazon...

Inhibits Rust And Corrosion.
Helps Control Electrolysis.
Lubricates Water Pump Seals.
Conditions Cooling System.

First Available: 12/02/2011

Brand: Bar's Leaks   |   Manufacturer: Bar's Leaks

Dimensions: 6.00 x 3.00 x 3.00 Inches   |   Weight: 0.69 Pounds

Warranty: See manufacturer

Amazon Price: $3.20 | as of 05/09/2024 (3:21am pst) *DETAILS
Availability: In Stock

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  #12

BlueDevil Products 00205 Radiator & Block Sealer - 16 Ounce

Asin: B00N3XVNXE   |   Model: 00205   |   PartNumber: 00205   |   Ean: 0891838002058   |   UPC: 891838002058

Features

  • Permanent repair for radiator and block leaks.
  • Works effectively on plastic, aluminum and/or metal radiators
  • Contains no solids or fibrous materials.
  • Safe and Easy to use.
  • Guaranteed
  • See more on Amazon...

Contains No Solids Or Fibrous Materials..
Guaranteed.
Safe And Easy To Use..
Works Effectively On Plastic, Aluminum And/Or Metal Radiators.

Brand: BlueDevil Products   |   Manufacturer: BlueDevil Products

Dimensions: 7.25 x 2.75 x 2.75 inches   |   Weight: 1.00 pounds

Warranty: limited

Amazon Price: $18.95 | as of 05/09/2024 (3:21am pst) *DETAILS

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  #13

AlumAseal ASLC16 Radiator Stop Leak and Conditioner Liquid - 16 Fl oz.

Asin: B0027I4IPG   |   Model: ASLC16   |   PartNumber: ASLC16   |   Ean: 0073905008464   |   UPC: 073905008464

Features

  • Stops leaks safely, quickly and easily
  • Compatible with all antifreeze and coolants
  • Safe and effective for all metal, plastic and rubber cooling system parts
  • Lubricates water pump
  • Guaranteed to work
  • See more on Amazon...

Safe And Effective For All Metal, Plastic And Rubber Cooling System Parts.
Guaranteed To Work.
Lubricates Water Pump.
Compatible With All Antifreeze And Coolants.

Brand: Gold Eagle   |   Manufacturer: Gold Eagle Co.

Dimensions: 8.25 x 4.00 x 1.75 Inches   |   Weight: 1.18 pounds

Warranty: Limited Waranty

Amazon Price: $18.95 ($1.18 / Fl Oz) | as of 05/09/2024 (3:21am pst) *DETAILS
Availability: In Stock

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  #14

Bars Leaks Radiator Stop Leak Concentrate (1196)

Asin: B00G70C1QI   |   Model: 1196   |   PartNumber: 1196

Brand: Bar's Leaks   |   Manufacturer: Bars Leaks

Amazon Price: $10.99 ($1.00 / Ounce) | as of 05/09/2024 (3:21am pst) *DETAILS
Availability: In Stock

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  #15

Bar's Leaks Radiator Stop Leak 2X Concentrate, 6 oz.

Asin: B006GUMITE   |   Model: 1194   |   PartNumber: 1194   |   Ean: 7258006535528, 0799621174480, 0046087011942   |   UPC: 046087011942, 799621174480

Features

  • Product type :Auto Accessory Stops and seals coolant leaks
  • Package dimensions :4.064 cm L x6.096 cm W x12.446 cm H It has double the power of most other stop leak products and saves
  • country of origin :United States coolant and/or water. One bottle treats systems
  • package weight :0.81lbs Works with all types and colors of antifreeze That s why we created the Bar s Leaks Radiator Stop Leak 2X Concentrate.
  • Seals Leaks in Radiators, Gaskets, Heater Core & Freeze P lugs Works with all types and colors of antifreeze coolant
  • See more on Amazon...

Country Of Origin :United States Coolant And/Or Water. One Bottle Treats Systems.
Seals Leaks In Radiators, Gaskets, Heater Core & Freeze P Lugs Works With All Types And Colors Of Antifreeze Coolant.
Package Weight :0.81Lbs Works With All Types And Colors Of Antifreeze That’S Why We Created The Bar’S Leaks Radiator Stop Leak 2X Concentrate..
Package Dimensions :4.064 Cm L X6.096 Cm W X12.446 Cm H It Has Double The Power Of Most Other Stop Leak Products And Saves.

First Available: 07/16/2012

Brand: Bar's Leaks   |   Manufacturer: Bar's Leaks

Dimensions: 6.50 x 1.80 x 3.00 Inches   |   Weight: 0.50 pounds

Warranty: No

Amazon Price: $9.99 ($1.66 / Ounce) | as of 05/09/2024 (3:21am pst) *DETAILS
Availability: In Stock

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  #16

ACDelco GM Original Equipment 10-108 Cooling System Sealing Tabs - 4 g (Pack of 5)

Asin: B0026JK8C8   |   Model: 10-108   |   PartNumber: 10-108   |   Ean: 0036666919363   |   UPC: 036666919363

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
  • See more on Amazon...

High Viscosity Product That Cures When Exposed To Air.
Designed For Quick And Easy Application, Assembly May Be Filled With Oil Or Coolant Immediately After Applying Sealant And Torqueing The Bolts.

First Available: 10/11/2018

Brand: ACDelco   |   Manufacturer: ACDelco

Dimensions: 0.00 x 0.00 x 0.00 Inches   |   Weight: 0.07 pounds

Warranty: No Warranty

Amazon Price: $2.21 | as of 05/09/2024 (3:21am pst) *DETAILS
Availability: In Stock
List Price: $6.44

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  #17

Bar's Leaks Radiator Stop Leak, 11 oz

Asin: B0CLB9NGG3   |   Model: 1199   |   PartNumber: 1199   |   Ean: 0046087011997   |   UPC: 046087011997

Features

  • DISSOLVED PELLETIZED FORMULA: Bar s Leaks Radiator Stop Leak seals internal, external and coolant-to-oil leaks. It is specially formulated to seal larger leaks better than other stop leak products.
  • STOPS CURRENT AND FUTURE LEAKS: Works safely and effectively on plastic, aluminum and metal radiators, heater cores, blocks, heads, gaskets and freeze plugs.
  • INHIBITS RUST AND CORROSION: Water Pump Lube lubricates water pump seal and inhibits the formation of rust and scale.
  • WORKS WITH ALL TYPES AND COLORS OF ANTIFREEZE COOLANT AND / OR WATER: Compatible with both conventional silicate-based and extended life (OAT/HOAT) antifreeze, all types and colors. Can also be used in straight water.
  • Bar s Leaks Radiator Stop Leak seals internal, external and coolant-to-oil leaks. It is specially formulated to seal larger leaks better than other stop leak products.
  • See more on Amazon...

Inhibits Rust And Corrosion: Water Pump Lube Lubricates Water Pump Seal And Inhibits The Formation Of Rust And Scale..
Bar’S Leaks Radiator Stop Leak Seals Internal, External And Coolant-To-Oil Leaks. It Is Specially Formulated To Seal Larger Leaks Better Than Other Stop Leak Products..
Works With All Types And Colors Of Antifreeze Coolant And / Or Water: Compatible With Both Conventional Silicate-Based And Extended Life (Oat/Hoat) Antifreeze, All Types And Colors. Can Also Be Used In Straight Water..
Stops Current And Future Leaks: Works Safely And Effectively On Plastic, Aluminum And Metal Radiators, Heater Cores, Blocks, Heads, Gaskets And Freeze Plugs..

Brand: Bar's Leaks   |   Manufacturer: Bar's Products

Warranty: See manufacturer

Amazon Price: $8.44 | as of 05/09/2024 (3:21am pst) *DETAILS
Availability: In Stock
List Price: $9.99

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  #18

Bar's Leaks 1109 Block Seal Liquid Copper Intake and Radiator Stop Leak - 18 oz. (4 Pack)

Asin: B0BTDW4RJL   |   Model: 1109-4PK   |   PartNumber: 1109-4PK

Features

  • PERMANENTLY FIXES COOLING SYSTEM LEAKS: . One step formula permanently repairs coolant loss problems on cars, trucks, vans, SUV s and RV s.
  • 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.
  • See more on Amazon...

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..
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..

Brand: Bar's Leaks   |   Manufacturer: Bar's Products

Warranty: Please see manufacturer

Amazon Price: $34.29 | as of 05/09/2024 (3:21am pst) *DETAILS
Availability: In Stock

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  #19

Genuine WELDIT Radiator Leak Seal and Conditioner

Asin: B00BUC9WIS   |   Ean: 0027797705024   |   UPC: 027797705024

Features

  • Seals leaks fast in your car's radiator gaskets, heater, and cracked block
  • Prevents corrosion. Lubricates water pump. Saves expensive repairs. Permanent
  • Beats the liquid stop leaks
  • Net weight: 3/4 oz.
  • See more on Amazon...

Beats The Liquid Stop Leaks.
Net Weight: 3/4 Oz..
Prevents Corrosion. Lubricates Water Pump. Saves Expensive Repairs. Permanent.

Manufacturer: WELDIT

Weight: 0.13 pounds

Amazon Price: $15.59 | as of 05/09/2024 (3:21am pst) *DETAILS
Availability: In Stock

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  #20

Dike Radiator Stop Leak - 1 Pint

Asin: B07PWHJQZL

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
  • See more on Amazon...

Preventing Antifreeze And Water From Seeping Into The Engine.
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.
Will Not Block Small Passages In The Cooling System.
Works With All Standard And Permanent Antifreezes.

Brand: Parts Express

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  #21

Gunk TITESEAL C551B Radiator Repair Powder - 2 oz.

Asin: B00200OWLG   |   Model: C551B   |   PartNumber: C551B   |   Ean: 6391847796664, 0078698355108   |   UPC: 078698355108

Features

  • TITESEAL 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.TITESEAL
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Brand: Gunk   |   Manufacturer: BBI- Blumenthal Brands Integrated (Gunk and Liquid Wrench)

Dimensions: 1.00 x 1.00 x 1.00 inches   |   Weight: 0.18 pounds

Amazon Price: $10.16 | as of 05/09/2024 (3:21am pst) *DETAILS
Availability: In stock Usually ships within 4 to 5 days.

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  #22

AlumAseal ASBPI12 Radiator Stop Leak Powder Blister Card - 20 g

Asin: B000FW61M4   |   Model: ASBPI12   |   PartNumber: ASBPI12   |   Ean: 0073905242882   |   UPC: 073905242882

Features

First Available: 09/28/2001

Brand: Gold Eagle   |   Manufacturer: Gold Eagle Co.

Dimensions: 3.00 x 5.00 x 1.00 Inches   |   Weight: 0.04 pounds

Warranty: Limited Waranty

Amazon Price: $34.99 ($49.28 / Ounce) | as of 05/09/2024 (3:21am pst) *DETAILS
Availability: In Stock

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  #23

Bars Leaks 01196 11 Oz Radiator Stop Leak Concentrate

Asin: B00QLHFD12   |   Ean: 0046087011966   |   UPC: 046087011966

Features

  • Efficient Radiator Leak Sealer: Effectively seals leaks and prevents coolant loss in automotive radiators, saving you from costly repairs.
  • User-Friendly Formula: Easily add the concentrated solution to your radiator for hassle-free leak repair and long-lasting protection against future leaks.
  • Versatile Compatibility: Suitable for use in both gasoline and diesel engines, ensuring compatibility with various cooling systems.
  • Prevents Overheating: By effectively sealing leaks, it helps maintain the proper engine temperature, preventing overheating and potential engine damage.
  • Universal Antifreeze Compatibility: Works seamlessly with all types of antifreeze, including both conventional and extended-life formulations, providing convenience and versatility for all users.
  • See more on Amazon...

Versatile Compatibility: Suitable For Use In Both Gasoline And Diesel Engines, Ensuring Compatibility With Various Cooling Systems..
Universal Antifreeze Compatibility: Works Seamlessly With All Types Of Antifreeze, Including Both Conventional And Extended-Life Formulations, Providing Convenience And Versatility For All Users..
Prevents Overheating: By Effectively Sealing Leaks, It Helps Maintain The Proper Engine Temperature, Preventing Overheating And Potential Engine Damage..
User-Friendly Formula: Easily Add The Concentrated Solution To Your Radiator For Hassle-Free Leak Repair And Long-Lasting Protection Against Future Leaks..

Brand: Bar's Leaks   |   Manufacturer: Bar'S Products

Dimensions: 6.50 x 9.00 x 3.00 inches   |   Weight: 0.69 pounds

Amazon Price: $7.94 | as of 05/09/2024 (3:21am pst) *DETAILS
Availability: In Stock

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  #24

A/C WELDIT Leak Seal for Car Truck Tractor / Radiators Heater Gaskets Cracked

Asin: B0B7XVBQ15   |   Ean: 0661537392886   |   UPC: 661537392886

Brand: Generic   |   Manufacturer: WELDIT

Amazon Price: $32.94 | as of 05/09/2024 (3:21am pst) *DETAILS
Availability: In Stock

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  #25

Bar's Leaks Radiator Stop Leak Tablets, 1.76oz

Asin: B0CLB953N4   |   Model: 1177   |   PartNumber: 1177   |   Ean: 0046087011775   |   UPC: 046087011775

Features

  • PROFESSIONAL STRENGTH FORMULA: Bar's Leaks Radiator Stop Leak Tablets inhibit the formation or rust and scale, neutralize pH imbalance, controls electrolysis, lubricates and seals internal, external and coolant-to-oil leaks.
  • OEM USED AND APPROVED: Same tablets as used by manyOEM auto and truck manufacturers around the world.
  • SEALS LEAKS AND SEEPAGE: For continued protection of the entire cooling system, repeat Bar s Leaks application every 15,000 miles or once per year.
  • WORKS WITH ALL TYPES OF ANTIFREEZE OR WATER: Professional strength formula works with ALL types and colors of antifreeze coolant including conventional, extended life, waterless and straight water.
  • Bar's Leaks Radiator Stop Leak Tablets inhibit the formation or rust and scale, neutralize pH imbalance, controls electrolysis, lubricates and seals internal, external and coolant-to-oil leaks.
  • See more on Amazon...

Seals Leaks And Seepage: For Continued Protection Of The Entire Cooling System, Repeat Bar’S Leaks Application Every 15,000 Miles Or Once Per Year..
Bar's Leaks Radiator Stop Leak Tablets Inhibit The Formation Or Rust And Scale, Neutralize Ph Imbalance, Controls Electrolysis, Lubricates And Seals Internal, External And Coolant-To-Oil Leaks..
Works With All Types Of Antifreeze Or Water: Professional Strength Formula Works With All Types And Colors Of Antifreeze Coolant Including Conventional, Extended Life, Waterless And Straight Water..
Oem Used And Approved: Same Tablets As Used By Manyoem Auto And Truck Manufacturers Around The World..

Brand: Bar's Leaks   |   Manufacturer: Bar's Products

Warranty: See manufacturer

Amazon Price: $4.99 | as of 05/09/2024 (3:21am pst) *DETAILS
Availability: In Stock

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  #26

Johnsen's 4618-12PK Radiator Treatment and Water Pump Lubricant - 12 oz., (Pack of 12)

Asin: B00C873H6C   |   Model: 4618-12PK   |   PartNumber: 4618-12PK   |   Ean: 0039101146188   |   UPC: 039101146188

Brand: Johnsen's   |   Manufacturer: Johnsen's

Dimensions: 6.50 x 11.50 x 8.75 inches   |   Weight: 11.00 Pounds

Warranty: check with manufacturer Regulararding warranty and support issues.

Amazon Price: $29.92 | as of 05/09/2024 (3:21am pst) *DETAILS
Availability: In Stock

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  #27

ABRO Super Seal, 11.4 oz., Permanently Seals Cracks & Holes, Copper Infused Liquid Glass Sealer, Withstands Extreme Conditions, Ideal for Engine Blocks, Radiators, Head Gaskets, & Freeze Plugs

Asin: B004JUVKD8   |   Model: SS-822   |   PartNumber: SS-822   |   Ean: 0790920129980   |   UPC: 790920129980

Features

  • ADVANCED SEALING TECHNOLOGY: ABRO Super Seal , enriched with innovative copper-reinforced liquid glass, provides a permanent seal for holes and cracks in engine blocks, heads, and radiators.
  • EXTREME CONDITIONS RESILIENCE: Withstanding both extreme temperatures and pressure loads, this highly effective head gasket sealant ensures a robust and enduring solution for all your automotive needs.
  • PERMANENT CRACK SEALING: Engineered to permanently seal cracks, ABRO Super Seal is a reliable gasket sealer that offers long-lasting protection for your vehicle's critical components, ensuring sustained performance.
  • VERSATILE AUTOMOTIVE APPLICATION: Ideal for engine blocks, radiators, and head gaskets, this radiator leak sealer is your go-to solution for various automotive sealing needs, providing versatile and comprehensive coverage.
  • FREEZE PLUG PROTECTION: ABRO Super Seal not only seals cracks but also serves as an effective radiator stop leak, safeguarding freeze plugs and ensuring optimal performance in even the most challenging conditions.
  • See more on Amazon...

Permanent Crack Sealing: Engineered To Permanently Seal Cracks, Abro Super Seal Is A Reliable Gasket Sealer That Offers Long-Lasting Protection For Your Vehicle's Critical Components, Ensuring Sustained Performance..
Freeze Plug Protection: Abro Super Seal Not Only Seals Cracks But Also Serves As An Effective Radiator Stop Leak, Safeguarding Freeze Plugs And Ensuring Optimal Performance In Even The Most Challenging Conditions..
Versatile Automotive Application: Ideal For Engine Blocks, Radiators, And Head Gaskets, This Radiator Leak Sealer Is Your Go-To Solution For Various Automotive Sealing Needs, Providing Versatile And Comprehensive Coverage..
Extreme Conditions Resilience: Withstanding Both Extreme Temperatures And Pressure Loads, This Highly Effective Head Gasket Sealant Ensures A Robust And Enduring Solution For All Your Automotive Needs..

Brand: ABRO   |   Manufacturer: ABRO

Dimensions: 13.15 x 4.65 x 10.67 Inches   |   Weight: 1.63 Pounds

Amazon Price: $9.99 | as of 05/09/2024 (3:21am pst) *DETAILS
Availability: In Stock

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  #28

Irontite All Weather Seal, Blue, 16 oz

Asin: B002BIZJMS   |   Model: 468-9130-16   |   PartNumber: 468-9130-16   |   Ean: 0805028130162   |   UPC: 805028130162

Features

  • Pour and Go - into your existing coolant mixture
  • Stays dissolved and suspended now and long into the future.
  • Stops Leaks in Radiators, Head Gaskets, Cylinder Heads, and Engine Blocks
  • Works in Gas or Diesel Engines
  • Works in Aluminium and Cast Iron Blocks and on hoses and any other kind of material.
  • See more on Amazon...

Stops Leaks In Radiators, Head Gaskets, Cylinder Heads, And Engine Blocks.
Works In Aluminium And Cast Iron Blocks And On Hoses And Any Other Kind Of Material..
Works In Gas Or Diesel Engines.
Stays Dissolved And Suspended Now And Long Into The Future..

Brand: Irontite   |   Manufacturer: IRON-TITE

Dimensions: 8.13 x 2.38 x 2.38 Inches   |   Weight: 1.00 Pounds

Warranty: LIMITED WARRANTY

Amazon Price: $25.88 | as of 05/09/2024 (3:21am pst) *DETAILS
Availability: In stock Usually ships within 2 to 3 days.

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  #29

Bar's Leaks C16 Liquid Radiator Stop Leak - 11 oz.

Asin: B000BPSVDW   |   Model: C16   |   PartNumber: C16   |   Ean: 0046087000021, 0046087011966   |   UPC: 046087011966, 046087000021

Features

  • Seals leaks
  • Conditions cooling system
  • Inhibits rust and corrosion
  • Lubricates water pump seals
  • Helps control electrolysis
  • See more on Amazon...

Inhibits Rust And Corrosion.
Helps Control Electrolysis.
Lubricates Water Pump Seals.
Conditions Cooling System.

First Available: 12/02/2011

Brand: Bar's Leaks   |   Manufacturer: Bar's Leaks

Dimensions: 6.00 x 3.00 x 2.00 Inches   |   Weight: 0.69 pounds

Amazon Price: $9.99 ($0.91 / Ounce) | as of 05/09/2024 (3:21am pst) *DETAILS
Availability: In Stock

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  #30

Permatex 09116 Fuel Tank and Radiator Repair Kit

Asin: B00G02PJ6C   |   Model: 09116   |   PartNumber: 09116   |   Ean: 0686226091161   |   UPC: 686226091161

Features

  • Seals holes, seams, or cracks on metal tanks, radiators, or gas cans
  • Quickly and easily knead together the two-component stick to form a tight seal
  • Provides excellent chemical and moisture resistance
  • Cures within 2 hours at ideal temperature
  • Not recommended for use on plastic gas tanks
  • Fit type: Universal Fit
  • See more on Amazon...

Provides Excellent Chemical And Moisture Resistance.
Not Recommended For Use On Plastic Gas Tanks.
Fit Type: Universal Fit.
Cures Within 2 Hours At Ideal Temperature.
Quickly And Easily Knead Together The Two-Component Stick To Form A Tight Seal.

First Available: 07/22/2015

Brand: Permatex   |   Manufacturer: Permatex

Dimensions: 1.40 x 1.50 x 0.70 Inches   |   Weight: 0.20 Pounds

Amazon Price: $4.90 | as of 05/09/2024 (3:21am pst) *DETAILS
Availability: In Stock
List Price: $14.46

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