The sprinkle method is recommended only when it is not feasible to drain the existing pond or in cases of isolated leaks when a spot treatment may be a possible alternative.
This method is less effective than the other two methods for several reasons:
If the bottom of the pond can be cleared, this method has greater chances of providing a good seal.
The granular grade of bentonite, Granular Seal (MSDS) (TECH SHEET), is best suited for this method of sealing leaking ponds. The granular bentonite should be used when using the sprinkle method because the particles are large enough to sink to the bottom, while finer particles cloud the water and stay in suspension. Begin by simply sprinkling the prescribed amount of granular bentonite Granular Seal on the water surface and allow it to fall into place. The granular bentonite particles will sink to the bottom of the pond or be drawn into porous areas where they will swell and reduce the seepage rate. The granular bentonite can be distributed over the pond surface by using a mechanical fertilizer or seed spreader. Even distribution insures adequate coverage.