9 bestRadiator Leak Sealerof May 2025
112M consumers helped this year.
1
K-Seal ST5516 HD Multi Purpose One Step Permanent Coolant Leak Repair
K-Seal
9.9
2
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
9.8
3
Liqui Moly Radiator Stop Leak | 250 ml | Cooler additive | SKU: 20132
Liqui Moly
9.7
4
K-Seal ST5501 Multi Purpose One Step Permanent Coolant Leak Repair
K-Seal
9.5
10% off
5
Prestone AS145 Radiator Sealer Stop Leak - 11 oz.
Prestone
9.3
6
Bar's Leaks PLT11 Pelletized Radiator Stop Leak - 11 oz.
Bar's Leaks
9.0
7
Bar's Leaks 1109 Block Seal Liquid Copper Intake and Radiator Stop Leak - 18 oz.
Bar's Leaks
8.7
8
Bar's Leaks HDC Radiator Stop Leak Tablet - 60 Grams
Bar's Leaks
8.4
9
Liqui Moly 8956 Radiator Stop-Leak - 150 ml
Liqui Moly
8.1
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