LIQUI MOLY Radiator Stop Leak 150ml – Instant Cooling System Sealant LIQUI MOLY Radiator Stop Leak instantly seals hard-to-find leaks in a water-cooled engine's cooling system caused by stone chips, porous solder joints or hairline cracks, and protects the combustion chamber from coolant ingress. Instant Leak Sealing: Seals hairline cracks and small leaks immediately. Protects the Combustion Chamber: Stops coolant ingress from internal leaks. Compatible with Antifreeze: Works with conventional coolants and antifreezes. Aluminium & Plastic Safe: Suitable for all radiator materials. Application Instructions: Shake well, add the contents to the cold cooling system, and start the heater. Drive for at least 10 minutes. One 150 ml bottle treats up to 10 litres of coolant. Store away from frost. Best For: All coolant and heating systems, with or without a water filter. Vehicles with small, hard-to-find coolant leaks. Preventive protection against future leaks. Stop coolant leaks fast with LIQUI MOLY Radiator Stop Leak. Order today for reliable, easy-to-use cooling system protection.