Granular Bentonite Clay Pond Sealer - 45 pounds

★★★★★ 4.9 54 reviews

US$42.22
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US$42.22
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Free shipping Free 30-day returns

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Management number 238349877 Release Date 2026/07/11 List Price US$42.22 Model Number 238349877
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<span><strong>Sodium Bentonite Clay</strong>&nbsp;for sealing ponds - 45 lb bag</span><p><span>One 45 pound bag = 0.63 cubic feet &nbsp;Covers 9 square feet at 6 pounds per square foot.</span></p><p><span><em>Bentonite clay is a natural expanding clay sealant that when exposed to moisture can expand 15X or more creating a very effective pond sealant when applied correctly.&nbsp;</em></span></p><p><span>Bentonite for Pond Sealing FAQ</span></p><span>Sodium Bentonite Source</span><p><span>Our bentonite clay is provided in granular form directly from the processing facility in Northeastern Wyoming.</span>&nbsp;</p><span>Bentonite Clay Application Rates for pond/lake bottoms</span><p><span>To properly apply bentonite to seal a pond, the pond must be drained and the bentonite clay then incorporated into the soil of the pond bottom and sides. The application rate for bentonite ranges from 2 pounds to more than 5 pounds per square foot depending on the soil characteristics. For clayey and silty soils, 2 pounds per square foot MAY be sufficient. For sandy soils 4 pounds MAY be sufficient and for soil containing gravel and rock, in excess of 5 pounds will be required to obtain a seal. Once the bentonite is applied, the soil should be disk harrowed to mix the soil and bentonite and then compacted.</span></p><p><span>Alternatively, a continuous blanket of bentonite can be applied to the soil and then carefully covered with clean soil or sand to prevent the clay from mobilizing into the water column. Placing the bentonite in a confined layer is far more effective as it forces the clay into adjacent soil pores creating a more effective seal.</span></p><span>Pond or Lake Dam Repair</span><p><span>For a leaking pond embankment, if the location of the leak has been identified, it may be possible to construct a core trench in the embankment to slow the leak. To install a core trench, excavate a minimum 12 inch wide trench to at least 3 feet below the pond bottom elevation. The trench should be located as far back from the pond edge as possible while still remaining on the flat top of the embankment.</span></p><p><span>The goal is to create an impervious core in the embankment which will not allow water to pass through. This impervious core can be created in a number of ways. Bentonite can be mixed with the excavated soil at a rate of 30% bentonite and 70% native soil. The material should be placed back in the trench and compacted with a trench roller, plate tamper, or excavator bucket in 6 inch lifts.&nbsp;</span></p>Sealing around Leaking Outlet pipes<p><span>&nbsp;Excavate at least 24" around the leaking outlet pipe. &nbsp;Replace the excavated soil with 100% Wyoming Sodium Bentonite Clay. &nbsp;Replace the native soil around the bentonite clay seal and compact in place with a trench roller or jumping jack compactor.</span></p><p>Ships via standard ground parcel service. &nbsp;&nbsp;</p><p></p>Bentonite Clay Reviews - What our Customers Say<p><strong>Awesome Dam hole plugging</strong></p><p>Your sodium bentonite clay worked awesome! I had a specific area, perhaps started by a muskrat years ago, sucking water and soil right through the dam lowering the pond about a foot so it wouldn't go over our outlet. We dug a trench with an excavator about 10 feet long x 1 foot wide x 4 feet deep. I only used 2/ 45 lbs. bags by mixing it with clay&nbsp;dirt 1/8 parts approximately. Now, just a few days later the overflow is overflowing again without any significant rainfall. I've tried other ways half a dozen times but never did it fill back in so well nor did it last. -&nbsp;<em>Daniel G.</em></p><p><strong>Works as Promised</strong>&nbsp;</p><p><em>hope this works as good as the first one did. will use again if needed. stoped leak for over 2 years.&nbsp;- Don W.</em></p><p><strong>It stopped our pond leak!</strong></p><p>We had been losing water out of our 1/3 acre pond but we couldn’t drain it to mix bentonite in with the soil because it&amp;rsq</p>

    • Natural expanding clay for pond sealing
    • Granular sodium bentonite clay
    • Soil amendment creates seal when mixed with pond soils
    • Expands on contact with water
    • Can be used to repair muskrat holes and damaged dams
  • Natural expanding clay for pond sealing
  • Granular sodium bentonite clay
  • Soil amendment creates seal when mixed with pond soils
  • Expands on contact with water
  • Can be used to repair muskrat holes and damaged dams
  • Natural expanding clay for pond sealing|Granular sodium bentonite clay|Soil amendment creates seal when mixed with pond soils|Expands on contact with water|Can be used to repair muskrat holes and damaged dams
Size 45 lbs
Liner size 45 mil
Material Clay
Pond liner type Pond Liner
Features Heavy Duty
Has written warranty No
Brand Natural Waterscapes
Color Gray
Count 1
Weight 46 lb

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