gook, ooze, gunk, flow, muck, slime, oozing, leakage, sludge, percolation, goo, goop, guck.
On the other hand, the seepage
may be all there is.
I sent him out there and he saw that oil seepage,
as I meant that he should!
But wherever you find a dense growth, as you do here, there you will find their roots giving out the seepage
that feeds a million streamlets, and these in turn feed the great rivers.