Pond Boss Forums INTRO Questions & Observations Pond using bentonite clay

Hi,

I want to create a pond using bentonite clay. I have read enough so that I have an idea of how to achieve it. But there is one question I can't figure out the answer to.

Is it possible to create a proper seal where bentonite meets rock? Where the bentonite only partially covers the rock, so that the top part of the rock is exposed?
Or will the water get between the rock and the bentonite, and destroy the seal?

Se pictures below.