10 bestRadiator Leak Sealerof April 2025
112M consumers helped this year.
6% off
1
K-Seal Coolant Leak, 236ml | Multi-use Car Radiator & Head Gasket Repair Sealant
K-Seal
9.8
2
Wynn's Car Radiator Stop Leak Sealant Antifreeze Coolant Repair Additive 325ml
Wynn's
9.6
3
Holts 1831469 Radweld Plus New Formula 250ml
Holts
9.3
4
K-Seal Permanent Coolant Leak Repair for Cooling Systems Head Gaskets Radiators
Generic
9.1
5
ARZER Car Radiator & Hose Stop Leak Repair Additive - Anti Corrosion 250ml - Repairs Weld Cooling System Rads
ARZER
8.8
OtherUp to 27% off
LIQUI MOLY Pro-Line Radiator Stop Leak K | 250 ml | Cooler additive | SKU: 5178
K-Seal HD Coolant Leak Repair, 472ml | HGV Radiator, Block & Head Gasket Sealant
FERNOX Central Heating Leak Sealer F4 Express 400ml - Fast Results - 30 sec - (Replacement 58232)
Carlube Radiator Sealer 500 ml
6
LIQUI MOLY Radiator Stop Leak | 150 ml | Cooler additive | SKU: 8956
Liqui Moly
8.5
8% off
7
Holts Radweld Radiator and Coolant System Leak Repair 250ml No
Holts
8.2
8
Holts Radweld Plus New Formula Leak Repair Total Cooling System Leak Repair
Generic
7.9
12% off
9
Holts Sealit Leak Repair 250ml, (Packing May Vary)
Holts
7.7
10
AMK® Holts Radweld Stops Leaks In Radiator & Hoses For Car Cooling System 250ml Repairs Leak
AMK
7.4
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