We use cookies to enhance the security, performance, functionality and for analytical and promotional activities. We use cookies to personalize ads for you. By continuing to browse this site you're agreeing to our Privacy PolicyWe use cookies to enhance your experience and personalize ads. By using the site, you agree to that. Privacy Policy

10 bestStop Leak For Radiatorsof November 2025

112M consumers helped this year.

10% off

1

EPAuto Spill Proof Radiator Coolant Filling Funnel Kit
EPAuto Spill Proof Radiator Coolant Filling Funnel Kit

EPAUTO

9.8

View Product
Buy it on Amazon

6% off

2

Orion Motor Tech Coolant Pressure Tester Kit, 19pc Radiator Pressure Tester Kit with 15 Radiator Adapters&Wrench, Cooling System Pressure Tester Kit for Water Tank with Vacuum Pump &Probe Thermometer
Orion Motor Tech Coolant Pressure Tester Kit, 19pc Radiator Pressure Tester Kit with 15 Radiator Adapters&Wrench, Cooling System Pressure Tester Kit for Water Tank with Vacuum Pump &Probe Thermometer

Orion Motor Tech

9.6

View Product
Buy it on Amazon

3

Bar's Leaks 1111 Head Gasket Fix - 24 oz.
Bar's Leaks 1111 Head Gasket Fix - 24 oz.

Bar's Leaks

9.3

View Product
Buy it on Amazon

4

K-Seal ST5501 Multi Purpose One Step Permanent Coolant Leak Repair
K-Seal ST5501 Multi Purpose One Step Permanent Coolant Leak Repair

K-Seal

9.0

View Product
Buy it on Amazon

5

K-SEAL Coolant Leak Repair, ST9501 472ml Multi-Purpose Formula Stops Leaks in the Radiator, Head Gasket, Block, Water Pump Casing, Heater Core, Freeze Plug - Pour and Go - Designed for Canadian Market
K-SEAL Coolant Leak Repair, ST9501 472ml Multi-Purpose Formula Stops Leaks in the Radiator, Head Gasket, Block, Water Pump Casing, Heater Core, Freeze Plug - Pour and Go - Designed for Canadian Market

K-Seal

8.7

View Product
Buy it on Amazon

Related productsUp to 25% off

Irontite All Weather Seal, Blue, 16 oz (468-9130-16)

Irontite All Weather Seal, Blue, 16 oz (468-9130-16)

View Deal
ACDelco Cooling System Seal Tablets, 5-4 grams, Pack of 5

ACDelco Cooling System Seal Tablets, 5-4 grams, Pack of 5

View Deal
Red Angel A/C Stop Leak - 2 Ounce (49496)

Red Angel A/C Stop Leak - 2 Ounce (49496)

View Deal
Bar's Leaks 1196 Grey Radiator Stop Leak - 11 oz.

Bar's Leaks 1196 Grey Radiator Stop Leak - 11 oz.

View Deal

6

XADO ATOMEX Stop Leak Engine Oil Additive Sealer (Bottle, 250 ml) - Repair Gaskets & Seals Treatment
XADO ATOMEX Stop Leak Engine Oil Additive Sealer (Bottle, 250 ml) - Repair Gaskets & Seals Treatment

XADO

8.4

View Product
Buy it on Amazon

7

K-Seal ST5516 HD Multi Purpose One Step Permanent Coolant Leak Repair
K-Seal ST5516 HD Multi Purpose One Step Permanent Coolant Leak Repair

K-Seal

8.1

View Product
Buy it on Amazon

8

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

Bar's Leaks

7.8

View Product
Buy it on Amazon

9

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

Bar's Leaks

7.5

View Product
Buy it on Amazon

8% off

10

emzone Multi 12A A/C Stop Leak (45856)
emzone Multi 12A A/C Stop Leak (45856)

Emzone

7.2

View Product
Buy it on Amazon

Related Reviews You Might Like

Ac Leak Stoppers

Ac Leak Stoppers

Radiator Stop Leaks

Radiator Stop Leaks
subscribe-icon

Best Reviews Guide Newsletter

Get exclusive articles, recommendations, shopping tips, and sales alerts

By submitting your email address you agree to our Terms and Conditions and Privacy Policy