TenBest

10 Best Coolant Stop Leaks

Updated November 2024

Top Choice

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

ATP Automotive

9.7

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

K-Seal

9.4

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Bar's Leaks 1109 Block Seal Liquid Copper Intake and Radiator Stop Leak

Bar's Leaks

9.2

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BlueDevil Oil Stop Leak

BlueDevil Products

8.9

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

Bar's Leaks

8.7

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Bar's Leaks Liquid Aluminum Stop Leak - 16.9 oz

Bar's Leaks

8.4

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

K-Seal

8.0

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BAR'S LEAKS 1196 Concentrated Radiator Stop Leak, 11oz

Bar's Leaks

7.7

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

Bar's Leaks

7.4

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Liqui Moly 20132 Radiator Stop Leak, 8.45 Fluid Ounces

Liqui Moly

7.1

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