Specially formulated tablets designed to help seal minor leaks in automotive cooling systems. Trusted by General Motors and used as factory-installed sealant in many GM vehicles, these sealing tabs work by circulating through the cooling system and sealing small leaks in radiators, heater cores, and engine blocks.Made with a unique blend of organic fibers and sealant materials, the tabs dissolve easily in coolant and form a protective barrier at leak points without clogging the cooling system.
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