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will a sealer stop my car from loosing coolant?

i have a 1987 chevy caprice and today the coolant was low so i filled it up and then later i checked it and it went low again? i dont see any sign of leaks but i was wondering if i should add sealer to the radiator maybe that will help? but i dont know


Without seeing an actual leak, I would suspect an internal problem (such as a head gasket or head going bad), but to answer your specific question, sealants will stop a SMALL leak that is not subject to high pressures, such as in a radiator. If the leak

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