Best cooling system additives - Buying Guide
Last Updated: 05/08/2024
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#1
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
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.
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
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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
See On Amazon #2
K-Seal ST3501 Pour and Go Head Gasket Sealer, 16oz, Permanent Repair for Blown Head Gaskets, Cracked Heads and Blocks
Asin: B00QYZIVA6 | Model: KSLST3501 | PartNumber: KSLST3501 | Ean: 5081946639580, 0855959003080, 5081946667378, 5081946639566, 5081946639542 | UPC: 855959003080
Scientifically Tested: K-Seal Is The Only Product To Have Been Successfully Tested By Brighton University Meeting The Demands Of Astm D3147 And Is Proven To Be The Best Sealer.
Universal Application & Permanent Repair: This Head Gasket Sealant Is Suitable For All Vehicles. Guarantees A Permanent Repair For The Lifetime Of The Engine..
No Draining Or Flushing: K-Seal Head Gasket Repair Is Easy To Use. It Eliminates The Need For Draining Or Flushing, Making It A Convenient Solution.
Permanent Head Gasket Repair: K-Seal Is The Simple And Permanent Fix For Blown Head Gaskets, Cracked Heads And Blocks, And Porous Engine Blocks..
Features
- Just Pour & Go Solution: Offers a simple, no-fuss solution to head gasket repair. No need for expensive repairs or a head gasket test kit. Just pour and go, it's the ultimate convenience in a bottle
- Permanent Head Gasket Repair: K-Seal is the simple and permanent fix for blown head gaskets, cracked heads and blocks, and porous engine blocks.
- Scientifically Tested: K-Seal is the only product to have been successfully tested by Brighton University meeting the demands of ASTM D3147 and is proven to be the best sealer
- No Draining or Flushing: K-Seal head gasket repair is easy to use. It eliminates the need for draining or flushing, making it a convenient solution
- Universal Application & Permanent Repair: This head gasket sealant is suitable for all vehicles. Guarantees a permanent repair for the lifetime of the engine.
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First Available: 11/15/2017
Brand: K-Seal | Manufacturer: Solv-Tec
Dimensions: 8.00 x 2.50 x 2.50 inches | Weight: 1.00 pounds
Warranty: Lifetime warranty does not cover abuse
See On Amazon #3
Red Line 80204 Engine Coolant Additive Supercool with Waterwetter - 12 Ounce (2 Pack)
Asin: B00NQ9STKA | Ean: 0685650339351, 0737534816370 | UPC: 737534816370, 685650339351
Improves Heat Transfer And Reduces Cylinder Head Temperature.
12 Ounces (2 Pack).
Use One Bottle For Most Passenger Cars And Light Trucks, Treats 3 To 5 Gallons Or 13.2 To 15.9 Liters, Vehicles With Larger Cooling Systems Should Use Two Bottles, Small Cooling Systems Should Use 1Oz (3 To 4 Capfuls) Per Quart.
Rust And Corrosion Protection Allows For Use Of Straight Water In Racing Or Reduced Antifreeze Levels In Warm Climates.
Features
- Unique agent for cooling systems that doubles the wetting ability of water
- Rust and corrosion protection allows for use of straight water in racing or reduced antifreeze levels in warm climates
- Improves heat transfer and reduces cylinder head temperature
- Use one bottle for most passenger cars and light trucks, treats 3 to 5 gallons or 13.2 to 15.9 liters, vehicles with larger cooling systems should use two bottles, small cooling systems should use 1oz (3 to 4 capfuls) per quart
- 12 Ounces (2 Pack)
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Brand: Red Line | Manufacturer: Red Line
Weight: 0.75 pounds
See On Amazon #4
Prestone AF-KIT Flush 'N Fill Kit
Asin: B000CCFY5W | Model: AF-KIT | PartNumber: AF-KIT | Ean: 0097496590603, 7262318373464, 0797496590602 | UPC: 097496590603, 797496590602
Removes Rust And Dirty Coolant That That Can Lead To A Clogged Radiator.
Easily Installs Antifreeze/Coolant In Minutes.
Prevents Potential Overheating And Engine Damage.
Allows You To Flush The Complete Cooling System, Not Just The Radiator, In One Easy Process.
Features
- Professionally back-flushes cooling systems of most cars and light trucks.Fit Type: Universal
- Allows you to flush the complete cooling system, not just the radiator, in one easy process
- Removes rust and dirty coolant that that can lead to a clogged radiator
- Prevents potential overheating and engine damage
- Easily installs antifreeze/coolant in minutes
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First Available: 02/01/2013
Brand: Prestone | Manufacturer: Prestone
Dimensions: 2.00 x 9.00 x 9.00 Inches | Weight: 0.25 pounds
Warranty: LIMITED WARRANTY
See On Amazon #5
Liqui Moly Radiator Cleaner | 300 ml | Cooler additive | SKU: 2051
Asin: B00CPL99N6 | Model: 2051 | PartNumber: 2051 | Ean: 0771395457563, 4100420020513, 4100420083693 | UPC: 771395457563
Weight: 0.8Lbs.
No Core Charge Req..
First Available: 05/09/2013
Brand: Liqui Moly | Manufacturer: Liqui Moly
Dimensions: 0.00 x 0.00 x 0.00 Inches | Weight: 0.55 pounds
See On Amazon #6
Subaru SOA635071 OEM Coolant System Conditioner
Asin: B00IGZP2UE | Model: SOA635071 | PartNumber: SOA635071 | Ean: 0826732934501 | UPC: 826732934501
Part Number: Soa635071.
Package Weight: 0.091 Kilograms.
Subaru Oem Coolant System Conditioner.
Features
- LOWEST COST TO OWN
- Subaru OEM Coolant System Conditioner
- Part number: SOA635071
- Package Weight: 0.091 kilograms
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Brand: Subaru | Manufacturer: Subaru
Dimensions: 0.00 x 0.00 x 0.00 Inches
See On Amazon #7
Liqui Moly Radiator Stop Leak | 250 ml | Cooler additive | SKU: 20132
Asin: B076ZP45Z5 | Model: 20132 | PartNumber: 20132 | Ean: 4100420201325
For All Cooling Water And Heating Systems With And Without Water Filters.
Liqui Moly Radiator Stop-Leak Completely Seals Such Leaks Immediately With Ease.
Secures The Combustion Chamber From Damages Caused By Coolant Admission.
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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First Available: 10/30/2017
Brand: Liqui Moly | Manufacturer: Liqui Moly
Dimensions: 0.00 x 0.00 x 0.00 Inches | Weight: 0.70 pounds
See On Amazon #8
VP Racing Fuels Cool Down 16 Oz Retail Bottle
Asin: B074VC2WWK | Model: 2085 | PartNumber: 2085 | Ean: 0846781003058 | UPC: 846781003058
Coolant Performance Enhancer Great For High-Performance Radiator Systems.
Increases Coolant Flow For Better Heat Transfer While Lubricating All The Vital Components.
Open The Bottle And Add Contents Straight Into The Radiator Or Coolant Reservoir; Use As Directed To Prevent Disruption Of The Freeze Protection Provided By Traditional Antifreeze Containing Glycol.
Features
- Cool Down coolant additive improves the performance of coolant and is safe for all radiator systems; It's ideal for racing, street, RV and tow vehicle applications
- Open the bottle and add contents straight into the radiator or coolant reservoir; Use as directed to prevent disruption of the freeze protection provided by traditional antifreeze containing glycol
- Coolant performance enhancer great for high-performance radiator systems
- Increases coolant flow for better heat transfer while lubricating all the vital components
- See more on Amazon...
Brand: VP Racing | Manufacturer: VP Racing Fuels
Dimensions: 0.00 x 0.00 x 0.00 inches | Weight: 0.00 Pounds
Warranty: Parts
See On Amazon #9
Bar's Leaks High Mileage Cooling System Repair
Asin: B00753MZWG | Model: 1150 | PartNumber: 1150 | Ean: 0046087011508 | UPC: 046087011508
Premium Carbon Fiber Formulation For Extended Protection.
Stops Cooling System Leaks.
Compatible With All Brands Of Anti-Freeze Including Conventional Green Or Blue And Extended Life Red/Orange Or Yellow (Oat/Hoat) Coolant.
Features
- Stops Cooling System Leaks
- Compatible with all brands of anti-freeze including conventional green or blue and extended life red/orange or yellow (OAT/HOAT) coolant
- Premium Carbon Fiber Formulation For Extended Protection
- Stops cooling system leaks
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First Available: 07/16/2012
Brand: Bar's Leaks | Manufacturer: Bar's Leaks
Dimensions: 8.40 x 1.80 x 3.60 inches | Weight: 1.30 pounds
Warranty: No
See On Amazon #10
Genuine Ford Fluid VC-8 Diesel Cooling System Additive - 16 oz., 2 count.
Asin: B07TVKSCXN | Model: VC-8 | PartNumber: VC-8 | Ean: 0031508379510 | UPC: 031508379510
Brand: Ford | Manufacturer: Ford
Weight: 1.00 Pounds
Warranty: Ford Limited Warranty
See On Amazon #11
Genuine Ford Fluid VC-8 Diesel Cooling System Additive - 16 oz.
Asin: B000NU3LPS | Model: VC-8 | PartNumber: VC-8 | Ean: 0031508421479 | UPC: 031508421479
Designed To Replace Additives Depleted Between Coolant Change-Outs.
Genuine Oem.
Now Dyed Yellow To Eliminate Engine Coolant Color Change When Mixing.
Replaces Yellow-Colored Motorcraft Gold Antifreeze/Coolant Meeting Ford Specification Wss-M97b51-A1.
Features
- Replaces fluorescent green-colored V119 premium antifreeze/coolant meeting Ford specification ESE-M97B44-A.Fit Type: Universal
- Replaces yellow-colored Motorcraft gold antifreeze/coolant meeting Ford specification WSS-M97B51-A1
- Designed to replace additives depleted between coolant change-outs
- Now dyed yellow to eliminate engine coolant color change when mixing
- Genuine OEM
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First Available: 02/25/2013
Brand: Ford | Manufacturer: Ford
Dimensions: 2.00 x 7.90 x 2.30 inches | Weight: 0.06 pounds
See On Amazon #12
EVANS Cooling Systems EC42001 Waterless Prep Fluid, 128 fl. oz.
Asin: B00OQD5VBK | Model: EC42001 | PartNumber: EC42001 | Ean: 0853613002097, 0853613002165 | UPC: 853613002097, 853613002165
Especially Important To Use When Block Drains Are Unavailable Or Cannot Be Removed Ensures That The Final Water Content After Installing Evans Waterless Coolant Meets Operating Limits.
Protects Cooling System Metals During Flush, But Is Not A Substitute For Evans Waterless Coolants.
Seeks Out Old Coolant And Water That Remain After Draining Existing Antifreeze/Water Mixture From An Engine.
Features
- Engineered specifically to purge the cooling system before installing new waterless coolant
- Seeks out old coolant and water that remain after draining existing antifreeze/water mixture from an engine
- Especially important to use when block drains are unavailable or cannot be removed Ensures that the final water content after installing Evans Waterless Coolant meets operating limits
- Protects cooling system metals during flush, but is not a substitute for Evans Waterless Coolants
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First Available: 10/13/2015
Brand: EVANS | Manufacturer: Evans Cooling Systems
Dimensions: 7.30 x 12.00 x 4.10 inches | Weight: 9.50 pounds
See On Amazon #13
Genuine Mopar Fluid 4318060AB Limited Slip Additive - 4 oz. Bottle
Asin: B000TTEX8W | Model: 4318060AC | PartNumber: 4318060AC | Ean: 4684505036007
The Package Height Is 8.001 Centimeters.
The Package Width Is 5.994 Centimeters.
The Package Length Is 5.791 Centimeters.
Features
- Genuine OEM Dodge/Molar factory fit part
- The package length is 5.791 centimeters
- The package height is 8.001 centimeters
- The package width is 5.994 centimeters
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Brand: Chrysler | Manufacturer: Mopar
Weight: 0.30 Pounds
See On Amazon #14
Genuine GM Fluid 12378255 Cooling System Seal Tablet - 4 Grams, (Pack of 5)
Asin: B00BK7MDN4 | Model: 12378255 | PartNumber: 12378255 | Ean: 0771395258320 | UPC: 771395258320
Engine Application Is Based On Liters Of Volume In Cooling System.
For Use With All Vehicles.
Formulated For Automotive Use.
Dex-Cool Compatible.
Features
- Non-toxic
- DEX-COOL compatible
- Engine application is based on liters of volume in cooling system
- Formulated for automotive use
- For use with all vehicles
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First Available: 02/20/2013
Brand: General Motors | Manufacturer: GM
Dimensions: 0.75 x 6.00 x 4.00 inches | Weight: 0.05 pounds
Warranty: GM Parts Warranty
See On Amazon #15
Genuine GM (12378255) Fluid 3634621 Cooling System Seal Tablet - 4 Grams, (Pack of 5)
Asin: B000QIH3C4 | Model: 12378255 | PartNumber: 12378255
Engine Application Is Based On Liters Of Volume In Cooling System.
For Use With All Vehicles.
Formulated For Automotive Use.
Dex-Cool Compatible.
Features
- Non-toxic
- DEX-COOL compatible
- Engine application is based on liters of volume in cooling system
- Formulated for automotive use
- For use with all vehicles
- See more on Amazon...
First Available: 02/20/2013
Brand: General Motors | Manufacturer: GM
Weight: 0.01 Pounds
See On Amazon #16
Red Line 80204 Engine Coolant Additive Supercool with Waterwetter - 12 Ounce
Asin: B01LRHHL3I
Improves Heat Transfer And Reduces Cylinder Head Temperature.
12 Ounces.
Use One Bottle For Most Passenger Cars And Light Trucks, Treats 3 To 5 Gallons Or 13.2 To 15.9 Liters, Vehicles With Larger Cooling Systems Should Use Two Bottles, Small Cooling Systems Should Use 1Oz (3 To 4 Capfuls) Per Quart.
Rust And Corrosion Protection Allows For Use Of Straight Water In Racing Or Reduced Antifreeze Levels In Warm Climates.
Features
- Unique agent for cooling systems that doubles the wetting ability of water
- Rust and corrosion protection allows for use of straight water in racing or reduced antifreeze levels in warm climates
- Improves heat transfer and reduces cylinder head temperature
- Use one bottle for most passenger cars and light trucks, treats 3 to 5 gallons or 13.2 to 15.9 liters, vehicles with larger cooling systems should use two bottles, small cooling systems should use 1oz (3 to 4 capfuls) per quart
- 12 Ounces
- See more on Amazon...
Brand: Red Line | Manufacturer: Red Line
See On Amazon #17
Design Engineering 40200 Radiator Relief Coolant Additive for All Water Cooled Engines, 16 oz.
Asin: B001HYQSE0 | Model: 40200 | PartNumber: 40200 | Ean: 0607078402004 | UPC: 607078402004
For Use In All Water Cooled Engines.
Safe With All Alloys - 100% Biodegradable, Non-Corrosive And Non-Toxic Additive.
Fit Type: Vehicle Specific.
Compatible With Water And All Anti-Freeze Mixtures.
Formulated With A Corrosion Inhibitor And Reduces Pre-Existing Scale Build-Up.
Features
- No mixing required; just add to cooling system and reduce engine operating temperature up to 30 degrees Fahrenheit
- Formulated with a corrosion inhibitor and reduces pre-existing scale build-up
- For use in all water cooled engines
- Compatible with water and all anti-freeze mixtures
- Safe with all alloys - 100% biodegradable, non-corrosive and non-toxic additive
- Fit type: Vehicle Specific
- See more on Amazon...
Brand: Design Engineering | Manufacturer: Design Engineering
Dimensions: 0.00 x 0.00 x 0.00 inches | Weight: 1.10 pounds
Warranty: Manufacturer Warranty
See On Amazon
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