Top 10 Heater Core Stop Leak – Fuel Leak Detectors

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1. Bar's Leaks

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

#adBar's Leaks #ad - Seals freeze plug leaks. Lowers water temperature. Repairs gasket leaks and heater core leaks. Special shipping information: This item cannot be returned and has additional shipping restrictions. Seals radiator leaks. Seals freeze plug leaks. Bar's leaks liquid aluminum stop leak seals radiator leaks. Repairs gasket leaks.

Brand	Bar's Leaks #ad
Manufacturer	Bar's Leaks #ad
Height	7.4 Inches
Length	2.6 Inches
Weight	1.2 Pounds
Width	2.6 Inches
Part Number	1186
Model	1186
Warranty	1 year manufacturer

2. K-Seal

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

#adK-Seal #ad - Customer support: if k-seal engine coolant leak stop doesn’t seal, the system might be over-pressurized. Save time/money. Us bestseller. Pour and go: our cooling system sealer is easy to use: just shake the bottle, add to your radiator/overflow and run the engine! Unlike some traditional products, it mixes with all types of antifreeze, absolutely no draining or flushing required.

The only car radiator and gasket sealant university tested to meet ASTM D3147. 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. Repairs in minutes: formulated to permanently weld radiators, including hard plastic aluminum heads and blocks in old and new cars.

Check the technical Specification section of this page for extra instructions for a successful repair. 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. Over 8 million bottles sold worldwide! .

Brand	K-Seal #ad
Manufacturer	K-Seal #ad
Height	6 Inches
Length	7.87 Inches
Weight	0.6 Pounds
Width	2 Inches
Part Number	ST5501
Model	ST5501
Warranty	When K-Seal makes a repair we guarantee it will be permanent

3. K-Seal

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Multi-Purpose Formula for Truck/Tractor Coolant Leaks in the Radiator, A True Pour & Go -Trade Trusted, K-SEAL Coolant Leak Repair ST5516 Heavy Duty 16oz, Head Gasket, Water Pump Casing & Heater Core

#adK-Seal #ad - Seals cracks and stops leaks: avoid expensive downtime, block, our coolant stop leak will permanently seal cracks and holes! Quickly repair your head gasket, freeze plug, leaking radiator, heater core & water pump casing with no adverse impact on efficiency. Check the technical Specification section of this page for extra instructions for a successful repair.

Over 8 million bottles sold. Repairs in minutes: create a permanent weld within the entire coolant system, including on hard plastic radiators and aluminum heads and blocks in larger capacity engines, AG, RV etc. The only industrial coolant sealant university tested to meet ASTM D3147. Save time/money. Customer support: if our engine coolant leak doesn’t seal your head gasket, the system might be over-pressurized.

Us bestseller. Scientifically tested: safe and effective, it withstands the high pressure of the combustion chamber, our Heavy Duty Coolant stop leak repair seals leaks up to 1/32 of an inch! Once cured, 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 competitive products, no draining, flushing or pulling the thermostat required.

Brand	K-Seal #ad
Manufacturer	K-Seal #ad
Height	1.9 Inches
Length	5.9 Inches
Weight	1.2 Pounds
Width	4.1 Inches
Part Number	ST5516
Model	ST5516
Warranty	When K-Seal makes a repair we guarantee it will be permanent

4. BlueDevil Products

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BlueDevil Head Gasket Sealer 38386

#adBlueDevil Products #ad - Safe and easy to use. Contains no solid or particulate matter that can harm a vehicles engine . Alternative solution for costly and time consuming repairs . Permanent Repair.

Brand	BlueDevil Products #ad
Manufacturer	BlueDevil Products #ad
Weight	2 Pounds
Part Number	38386
Model	38386
Warranty	LIMITED WARRANTY

5. ATP Automotive

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8 Ounce Bottle, ATP AT-205 Re-Seal Stops Leaks

#adATP Automotive #ad - Rejuivinates all rubber seals & gaskets in engines, power steering, transmissions, differentials and hydraulic systems. Does not contain petroleum distillates, will not over-swell or breakdown seals. Compatible with conventional and synthetic oils, gear oil, ATF, power steering fluids and hydraulic oil. Professional strength fast acting resealer, stops leaks fast. 8oz bottle will treat a 6 quart capacity, adjust accordingly.

Brand	ATP Automotive #ad
Manufacturer	ATP #ad
Height	4 Inches
Length	7 Inches
Weight	0.11 Pounds
Width	4.5 Inches
Part Number	AT-205
Model	AT-205
Warranty	Money Back Guarantee

6. Genuine GM

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

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

Brand	Genuine GM #ad
Manufacturer	GM #ad
Part Number	12378255
Model	12378255

7. Bar's Leaks

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11 oz., Bar's Leaks 1196 Radiator Stop Leak

#adBar's Leaks #ad - Works with all types and colors of anti-freeze coolant. One bottle treats up to 4 gallons. Manufacturer: bAR'S LEAKS. Stops and seals coolant leaks. Country of manufacture: United States. Auto & truck Maintenance.

Brand	Bar's Leaks #ad
Manufacturer	Bar's Leaks #ad
Height	5 Inches
Length	1.6 Inches
Weight	0.5 Pounds
Width	2.4 Inches
Part Number	1196
Model	1196
Warranty	No

8. Bar's Leaks

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

#adBar's Leaks #ad - Repairs blocks. Repairs blown head gaskets. Repairs freeze plug leaks. Repairs heater core leaks. Seals larger leaks seals.

Brand	Bar's Leaks #ad
Manufacturer	Bar's Leaks #ad
Height	2.6 Inches
Length	7.5 Inches
Weight	1.3 Pounds
Width	2.6 Inches
Part Number	1109
Model	1109

9. Prestone

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Prestone AS195 Complete Care and Stop Leak, 22 oz.

#adPrestone #ad - Helps in just 1 treatment. Reduces friction and protects against corrosion. Also stops and prevents leaks in all major cooling system components. Formulated with patented Grafted Polymer Technology. Extends and protects water pump life.

Brand	Prestone #ad
Manufacturer	Prestone #ad
Height	7.45 Inches
Length	2.24 Inches
Width	3.89 Inches
Part Number	AS195
Model	AS195

10. Bar's Leaks

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Bar's Leaks 1194 Radiator Stop Leak Concentrate, 6 oz.

#adBar's Leaks #ad - Works with all types and colors of anti-freeze coolant. Stops and seals coolant leaks. One bottle treats up to 3 gallons.

Brand	Bar's Leaks #ad
Manufacturer	Bar's Leaks #ad
Height	6.5 Inches
Length	1.8 Inches
Weight	0 Pounds
Width	3 Inches
Part Number	1194
Model	1194
Warranty	No