Mixed Blanket Method

  • Drain the region to be treated and eliminate all stones and plant development.
  • Use 1 piece granular or powdered bentonite mixed with 5 parts dirt to fill big openings and holes.
  • Plow the region to be treated to a thickness of 4 to 6 inches and permit soil to dry.
  • Employ bentonite into the area working with the ratio dependent on the bucket system or the program rate graph.
  • Once the whole area was covered, combine the bentonite with the very best 3 to 4 inches of dirt, with a disk, spike tooth harrow or hands rake, and then roll or tamp to compact it.

Sandy soil works great for blending with bentonite since it compacts better. If clay soil is used it has to be nice and with no lumps.

Pure Blanket Method

  • Drain the area to be treated
  • Spread powdered bentonite (unmixed with dirt) at a speed of 1 to 4 pounds per square foot across the bottom of the pond
  • Cover bentonite with three or four inches of soil, sand or fine sand
  • This really is the best way but takes the most maintenance, because bentonite should cover the whole surface to stop escapes

The Sprinkle Method

The pond doesn’t need to be drained but the specific location of the leak has to be known. Bentonite sinks into the bottom where it warms.
The bentonite gel that is created is drawn to the leaky pits and closes them. This method is not as effective as the mixed or pure blanket methods but will normally work if the location of the leak is known and enough bentonite is used.

In most methods of bentonite uses, it’s the swelling of the particles that stop the flow. Bentonite won’t halt the flow immediately. A little seepage is to be expected for up to a week after the bentonite is applied. Bentonite will not swell in water containing large quantities of mineral salts or acids.