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CASING SEAL™ sodium bentonite is a mixture of random-sized particles of a utility grade, granular Wyoming sodium bentonite, a naturally occurring, non-treated swellable clay. Because of its high swelling capacity, CASING SEAL bentonite is an effective sealing material for sealing a leaking pond, and for use as a clay liner.

Applications/Functions

• Seal leaking ponds and dams
• Seal earthen structures
• Use to prepare a clay liner under storage tanks and landfills
• Seal casing in cable tool and in air drill casing hammer operations
• Lubricate casing while being driven
• Plug abandoned holes 

Advantages

• Effective in sealing and grouting
• Simple to apply
• Flexible seal providing low permeability that prevents commingling of aquifers and entry of surface contaminants
• Prevents entry of pollutants from the surface 

Typical Properties

• Appearance - coarse granular
• Color - Variable in color from blue to gray
• Particle size - 8 to 14 mesh
• Bulk density, lb/ft3 - 73 (as packaged)
• Specific gravity - 2.6 

Recommended Treatment

To seal a pond
Depending on the native soil, disc in or mix 3 to 5 pounds of CASING SEAL per square foot (14-24 kg/m2) uniformly over the area to be sealed so that a 6-inch (~152 mm) blanket of soil and CASING SEAL is formed. Do not neglect the edges of the dam or the sides/walls of the pond. This sealing blanket should then be compacted in place and as a further protection to the sealing blanket, 2 to 4 inches (51-102 mm) of local soil or sand should cover the sealing blanket and be compacted.

If there is water in the pond that is leaking and the leaking area can be localized, cover the leaking area from the surface with 4 to 6 pounds of CASING SEAL per square foot (20-30 kg/m2)of surface area. The CASING SEAL area should then be covered with a layer of sand or local soil to protect the CASING SEAL.

Note:
Uncovered CASING SEAL is not harmful. However, colloidal particles formed as a result of the free swell of bentonite clay could clog the gill action of some fish.

To seal and lubricate driven steel casing

1. Dig a cone-shaped depression around the casing. Depression should be 2 to 3 feet (60-90 cm) deep and 6 to 8 inches (152-203 mm) larger at the surface than the casing diameter.
2. Keep cone-shaped depression filled with dry CASING SEAL protected from getting wet at all times while driving the casing.

To suspend cuttings while cable tool drilling

1. Place CASING SEAL in plastic bags.
2. With the tools out of the hole, drop enough bags to get about 10 pounds (4.5 kg) of CASING SEAL to the bottom of the hole.
3. If the hole is dry, add water. While drilling ahead, the churning action of the tools will form a thick slurry that will support the cuttings off bottom and make it easier for the bailer to remove them. 

Packaging

CASING SEAL bentonite is packaged in 50-lb (22.7 kg) multiwall paper bags, containing 0.7 ft3.