If the plug is leaking, the plug and gasket need to be replaced. And the drain plug opening surface on the pan has to be checked and resurfaced if not smooth. Emery cloth would be the correct choice for that job. Little to no grit shed with use.
You can use a sealant. It is a temporary fix if the oil pan threads are damaged. Would have to be used every oil change and may have to wait for sealant to set up
Action
You can use a sealant. It is a temporary fix if the oil pan threads are damaged. Would have to be used every oil change and may have to wait for sealant to set up
Action