RZWILL RZ20R Radiator Stop Leak, 250 mL

RZWILL RZ20R Radiator Stop Leak is an advanced coolant additive engineered to permanently seal minor leaks in radiators, heater cores, and cooling system gaskets without disassembly or part replacement. Its precision-formulated suspension remains stable under high pressure and temperature while remaining flexible to absorb engine vibrations. Fully compatible with all ethylene glycol and propylene glycol antifreezes and boil-over inhibitors. Provides superior rust and corrosion inhibition for aluminum, copper, brass, and cast iron components. Prevents overheating, coolant loss, and catastrophic engine damage. Safe for rubber hoses, silicone seals, and plastic components. Recommended for gasoline and diesel engine cooling systems meeting European OEM specifications including VW TL 774, BMW LL-04, and Mercedes-Benz 325.2.