Top 10 Bars Cooling System Repair – Cooling System Additives

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1. Bar's Leaks

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16.9 oz, Bar's Leaks Cooling System Repair

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Bar's Leaks #ad - Compatible with all brands of anti-freeze including conventional green or blue and extended life red/orange or yellow OAT/HOAT coolant. Stops cooling system leaks. Premium carbon fiber formulation for extended protection.
BrandBar's Leaks #ad
ManufacturerBar's Leaks #ad
Height8.4 Inches
Length1.8 Inches
Width3.6 Inches
Part Number1150
Model1150
WarrantyNo

2. Bar's Leaks

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

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Bar's Leaks #ad - Seals radiator leaks. Lowers water temperature. Seals freeze plug leaks. Repairs gasket leaks and heater core leaks. Special shipping information: This item cannot be returned and has additional shipping restrictions. Seals freeze plug leaks. Bar's leaks liquid aluminum stop leak seals radiator leaks. Repairs gasket leaks.
BrandBar's Leaks #ad
ManufacturerBar's Leaks #ad
Height7.4 Inches
Length2.6 Inches
Weight1.2 Pounds
Width2.6 Inches
Part Number1186
Model1186
Warranty1 year manufacturer

3. Bar's Leaks

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

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Bar's Leaks #ad - Inhibits rust and corrosion. Helps control electrolysis. Lubricates water pump seals. Seals leaks. Conditions cooling system.
BrandBar's Leaks #ad
ManufacturerBar's Leaks #ad
Height6 Inches
Length3 Inches
Weight0.85 Pounds
Width3 Inches
Part NumberPLT11
ModelPLT11

4. K-Seal

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Pour and Go, Trade Trusted-Stop Leak, K-SEAL Coolant Leak Repair, Water Pump Casing, Head Gasket, Block, ST5501 8oz, Multi-Purpose Formula Stops Leaks in the Radiator, Heater Core, and Freeze Plug

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K-Seal #ad - Repairs in minutes: formulated to permanently weld radiators, including hard plastic aluminum heads and blocks in old and new cars. Scientifically tested: safe and effective, our cracked block repair can seal leaks up to 1/32 of an inch! Once cured, the repair withstands the high pressure of the combustion chamber, all without failing or clogging the cooling system.

Pour and go: our cooling system sealer is easy to use: just shake the bottle, it mixes with all types of antifreeze, add to your radiator/overflow and run the engine! Unlike some traditional products, absolutely no draining or flushing required. Us bestseller. Seals cracks and stops leaks: a diy alternative to costly repairs, freeze plug, our coolant leak fix permanently seals cracks and holes! It quickly repairs your leaking radiator, heater core and water pump casing with no adverse impact on efficiency.

The only car radiator and gasket sealant university tested to meet ASTM D3147. Over 8 million bottles sold worldwide! Check the technical Specification section of this page for extra instructions for a successful repair. Save time/money. Customer support: if k-seal engine coolant leak stop doesn’t seal, the system might be over-pressurized.
BrandK-Seal #ad
ManufacturerK-Seal #ad
Height6 Inches
Length7.87 Inches
Weight0.6 Pounds
Width2 Inches
Part NumberST5501
ModelST5501
WarrantyWhen K-Seal makes a repair we guarantee it will be permanent

5. K-Seal

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Radiator & Heater Core. A True Pour & Go, Trade Trusted Stop Leak, K-SEAL Ultimate Permanent Head Gasket Repair ST3501 16oz Multi-Purpose Formula Stop Leaks in the Head Gasket, Cracked/Porous Blocks

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K-Seal #ad - Scientifically tested: safe, effective, our head gasket and block repair seals leaks up to 1/32 of an inch! Once cured, the repair withstands the high pressure of the combustion chamber, all without failing or clogging the cooling system. Pour and go: our head gasket sealer is easy to use just shake, absolutely no draining, it mixes with all types of antifreeze, add to your radiator/overflow and run the engine! Unlike some competitive products, flushing or pulling the thermostat required.

Over 8 million bottles sold. Save time/money. Check the technical Specification section of this page for extra instructions for a successful repair. The only head gasket and block sealant that is 3rd party tested to meet ASTM D3147. Customer support: if our head gasket repair leak doesn’t seal your intake gasket, the system might be over-pressurized.

Seals cracks and stops leaks: a diy alternative to costly repairs, freeze plug, leaking radiator, our head gasket fix permanently seals cracks and holes! Quickly repair your blocks, heater core and water pump casing with no adverse impact on efficiency. Repairs in minutes: permanently fix blown head gaskets, cracked heads and cracked/porous blocks including aluminum heads in old and new cars. Us bestseller.
BrandK-Seal #ad
ManufacturerK-Seal #ad
Height8 Inches
Length2.5 Inches
Width2.5 Inches
Part NumberST3501ND
ModelKSLST3501
WarrantyLifetime warranty does not cover abuse

6. Bar's Leaks

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Bar's Leak HG-1 HEAD SEAL Blown Head Gasket Repair

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Bar's Leaks #ad - Seals cracked cylinder heads and blocks. Repairs blown head and intake gasket leaks. Stops heater core and radiator leaks. Fixes leaking freeze and core plugs.
BrandBar's Leaks #ad
ManufacturerBar's Leaks #ad
Height3.22 Inches
Length9.78 Inches
Weight2.65 Pounds
Width3.22 Inches
Part NumberHG-1
ModelHG-1
WarrantyManufacturer Warranty

7. Genuine GM

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4 Grams, Pack of 5, Genuine GM 12378255 Fluid 3634621 Cooling System Seal Tablet

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Genuine GM #ad - Engine application is based on liters of volume in cooling system. Dex-cool compatible. Non-toxic. For use with all vehicles. Formulated for automotive use.
BrandGenuine GM #ad
ManufacturerGM #ad
Part Number12378255
Model12378255

8. Bar's Leaks

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Bar's Leaks J-100 DiFM Cooling System Treatment, 5 Grams

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Bar's Leaks #ad - Helps control electrolysis and helps neutralize pH imbalance. Stops radiator tank seal leaks. Inhibits the formation of rust and scale. Seals internal, external and coolant to oil leaks. Lubricates water pump seal.
BrandBar's Leaks #ad
ManufacturerBar's Leaks #ad
Height3.6 Inches
Length6.6 Inches
Width3.6 Inches
Part NumberJ-100
ModelJ-100
Warranty1 year manufacturer

9. Bar's Leaks

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

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Bar's Leaks #ad - Inhibits rust and corrosion. Conditions cooling system. Lubricates water pump seals. Seals leaks. Helps control electrolysis.
BrandBar's Leaks #ad
ManufacturerBar's Leaks #ad
Height0.8 Inches
Length7.5 Inches
Weight0.2 Pounds
Width5 Inches
Part NumberHDC
ModelHDC
WarrantyManufacturer Warranty

10. Bar's Leaks

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Bar's Leaks 1100 Head Gasket Repair, 20 oz.

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Bar's Leaks #ad - Head gasket sealant is not compatible with antifreeze and must only be added to the cooling system after ALL ANTIFREEZE has been flushed and removed. Included components: Unit, Instruction Guide. Stops block leaks. Dual action 2 part formula — liquid ceramic: liquid penetrates large and small leaks to form a seal actually harder than the original head gasket — REINFORCED FIBERS: Fiber additives lock together with liquid to increase strength and promote a permanent seal. Repairs blown head gaskets. Seals cracked cylinder heads and blocks.
BrandBar's Leaks #ad
ManufacturerBar's Leaks #ad
Height8.3 Inches
Length1.8 Inches
Weight1.5 Pounds
Width3.4 Inches
Part Number1100
Model1100
Warranty1 year manufacturer