Bar"s Leaks Original Pelletized Formula Heavy-Duty Stop Leak, 11 oz: * Seals internal, external and coolant-to-oil leaks * Seal larger leaks better than other stop-leak products * Works on plastic, aluminum and metal * Water Pump Lube lubricant ingredients * Compatible with both conventional extended life antifreeze * Bottle treats systems up to 4 gallons * Model# PLT11 * Made in the USA