PERMANENTLY FIXES COOLING SYSTEM LEAKS. One step formula permanently repairs coolant loss problems on cars, trucks, vans, SUV’s and RV’s. ANTIFREEZE COMPATIBLE - NO DRAINING REQUIRED: Antifreeze compatible sodium silicate liquid glass penetrates large and small leaks in plastic, aluminum and cast iron heads, blocks, intake manifold & gaskets, freeze plugs, heater cores and radiators.
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