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Radiator Sealer

10 Best Radiator Sealer 2024 in the US

Winner

K-Seal ST5

K-Seal

K-Seal ST5501 Multi-Purpose One Step Permanent Coolant Leak Repair, 8oz, Pour and Go, Mixes with All Antifreeze, No Flushing Required

10.0

score

BlueDevil

BlueDevil Products

BlueDevil Products 38386 Head Gasket Sealer - 1 Quart

9.7

score

BlueDevil

BlueDevil Products

BlueDevil Products 00209 Pour-N-Go Head Gasket Sealer - 16 Ounce

8.5

score

K-Seal ST3

K-Seal

K-Seal ST3501 Pour and Go Head Gasket Sealer, 16oz, Permanent Repair for Blown Head Gaskets, Cracked Heads and Blocks

8.2

score

K-Seal ST5

K-Seal

K-Seal ST5516 Heavy-Duty Multi-Purpose One Step Permanent Coolant Leak Repair, 8oz, Pour and Go, Mixes with All Antifreeze, No Flushing Required

7.9

score

Permatex 2

Permatex

Permatex 22071 Water Pump and Thermostat RTV Silicone Gasket, 0.5 oz., 0.5 Ounce , blue

7.9

score

J-B Weld 2

J-B Weld

J-B Weld 2120 Radiator Repair Kit

7.6

score

Bar's Leak

Bar's Leaks

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

7.6

score

Bar's Leak

Bar's Leaks

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

7.3

score

ACDelco GM

ACDelco

ACDelco GM Original Equipment 10-108 (12378255) Cooling System Sealing Tabs - 4 g

7.0

score

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