seep away
[for a fluid] to escape little by little, as through a leak. All the oil seeped away, leaving none in the engine. The water seeped away after a while.
seep in (to something)
[for a fluid] to trickle or leak out of something. Water is seeping into the basement. Water is seeping in very slowly.
seep out (of something)
[for a fluid] to trickle or leak out of something. A lot of oil has seeped out of the car onto the driveway. There is oil seeping out. There must be a leak.
seep through something
[for a fluid] to permeate something and escape. The oil seeped through the gasket onto the ground. Some water seeped through the ceiling, ruining our carpet as well as the ceiling.