No.  Leaks in the water pump require replacing the pump.  The same is with leaks in hoses (replace hose).

Use Blue Devil (16 or 32 oz.) on leaks in a radiator.  Sealers added to a cooling system respond to blown/cracked heads, heater core or hose and freeze plugs.

Make sure you inspect the cooling system and engine visually to determine where the coolant is going- use a pressure tester if needed.   Remember no engine can handle a loss of coolant and mostly overheats soon when leaks develop. So look first in radiator or heater hoses, the water pump, radiator, heater core or engine freeze plugs where coolant can escape.