Compatible With Conventional Coolant Water Refiners And Antifreezes. Suitable For Aluminum Radiators. Permanently And Reliably Seals Hairline Cracks And Small Leaks. No Negative Side Effects On The Water Pump Or Heating Circuit. BRAND - LIQUI MOLY is Germany's most popular brand of motor oil. For years awards such as "Top Brand" or "Best Brand" have reflected our excellent reputation among both experts and end consumers. These series victories are anything but a coincidence or merely automatic. They are the result of the daily commitment. It is this togetherness that makes us strong that makes us special that makes us successful around the world. It is this "us" that makes our brand!. For Preventive Use