A Bulk Seal creates a watertight seal between the radiator core and the aftercooler core. This prevents coolant from leaking from the radiator and air from leaking from the aftercooler core. It absorbs vibrations. This helps to reduce wear and tear on the components.Attributes:• Manufactured with Rubber which gives excellent corrosion resistance• Manufactured to precise specifications and is built for durability and reliabilityApplications:A Bulk Seal is positioned between the radiator core and aftercooler core and is responsible for sealing the two cores together and preventing leaks.