I would stay away from the "Polymer Sealers" They can't last or remain useful, long term.
Bentonite needs to be disked into the soils at least 12" at a varying concentration that will depend on your soils, moistened, then well compacted using a sheepsfoot roller. The thicker the better to avoid something digging/punching through the sealing layer.
Have you dug any test holes to see if there is good clay under the current soils? Even 10-15 feet deep in a borrow pit near the pond could save money.
As for compacting, a self powered, vibratory sheepsfoot can climb straight up and down a pretty steep bank.
Last edited by Rainman; 04/17/15 03:01 PM.
