Multiple U.S. Warehouse LocationsBroken ApexFree shipping on qualified orders over $100*
The Liqui Moly Radiator Stop‑Leak is a coolant additive that immediately seals small external leaks, porous solder joints and hairline cracks in water-cooled engines. It prevents coolant loss and internal leakage into combustion chambers without blocking flow or causing overheating. Safe for aluminum and plastic radiators, one can treats about 10 liters of coolant and is compatible with most antifreezes for preventive or repair use.
LIQUI MOLY 250mL Radiator Stop-Leak
