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Education Center

Crack Repair using Sodium Bentonite in Crystal Lake

Part of the process for diagnosing seepage in a client’s home is walking the perimeter of the home with the homeowner noting the location of cracks in the foundation. Look very closely at the picture to the left. Notice the vertical crack directly above the work area? These can be difficult to spot but our Waterproofing Experts have a very keen eye.  Many times, these cracks correspond with the area of seepage in the basement. Your Midwest Waterproofing Expert may also run a hose to determine if the crack is the source of the seepage.

In some situations, such as with a block foundation, Sodium Bentonite is not an option. Your Waterproofing Expert will explain the reasons and offer alternatives.

If the crack is clearly visible like in the photo above and is free of obstructions, The Midwest Waterproofing Expert may recommend a process called a “post hole dig” repair using Sodium Bentonite as an alternative to an epoxy/urethane injection from the inside

Sodium Bentonite is an effective, low-cost methods of sealing foundation cracks from the exterior.  Also, it is environmentally friendly because it contains no toxins. Perfect for clients with pets and children

Crystal Lake and the surrounding area has a particularly good soil for using Sodium Bentonite called Crystal Lake silt loam.

How Do Sodium Bentonite Repairs Work?

To repair a foundation wall crack using sodium bentonite, the installer digs a small hole against the foundation using a post hole digger. He digs down to the bottom of the foundation to the footing, exposing the entire crack. The hole is then filled nearly to the top with Sodium Bentonite and is covered with soil and whatever landscaping was removed so there is virtually no sign of the repair.  The installer may use a small amount of membrane material or epoxy to seal the crack that is exposed above ground. 

The dry sodium bentonite absorbs water from the  ground which causes it to expand dramatically.  This causes the expanding Bentonite to ooze into the crack from top to bottom causing a seal that is warrantied for a lifetime. If the soil is extremely dry, the installer may add a little water to start the process. 

Because sodium bentonite is applied from the exterior of the foundation, it is an ideal choice when the crack is not accessible from the inside because the basement has been finished or there are other obstructions such as utilities.

Sodium Bentonite cannot be used on cracks in corners or when there is a permanent obstruction such as a cement porch,  blocking access to the crack. However, if a patio, sidewalk or driveway covers the ground next to the foundation, we can cut out the paving material and replace it afterward. We can also dismantle decks or porches to gain access then rebuild it afterwards. 

If you are experiencing seepage call Midwest Waterproofing at 815-245-6890 or click here to Book Online