my car still overheats even with steal seal applied is there another solution on 2000 Cadillac DeVille

antie freeze sometimes leaks out from the overflow. how high do the engine gets before i start to worry,

Asked by for the 2000 Cadillac DeVille
I would let not it run over 230 degrees it sounds like you got a stuck thermastat or a head gasket check the oil to see if it is milky