Bentonite deposit cross-sectionOregon bentonite is believed to be the result of volcanic ash falling into an alkaline lake during the Tertiary age and was formed by alteration of that ash.  The variety of Montmorillonite clay known as Sodium Bentonite has the property of swelling up to ten times its own weight when hydrated with water.  This clay consists of stacked platelets that expand Perma-Plug® bentonitewhen water surrounds them. This swelling property is what causes bentonite to be a natural soil sealant.  The lower the clay (Montmorillonite) content, the more bentonite it will take for any soil sealant application.  Another property of the clay is when wet it is extremely slippery, which opens the door for many uses as a lubricant.  

Teague Mineral Products mines bentonite that has 80-95% montmorillonite content. It is a quality Sodium bentonite, high swelling with a low water loss.  Commercially it comes from a well-developed mining operation where no surface clay goes into the product.  Surface clay can be contaminated with chemical salts from the soil that has covered the deposit for millions of years.  It is important that proper mining practices are followed to insure that the quality of the product is maintained.

Mankind will continue to find new uses for bentonite clay in addition to the current claim of 1000 uses for the mineral.  The most extensive deposits are found in Wyoming where the clay was first used worldwide.  Oregon bentonite clays were first used commercially in the 1960’s for soil sealants and livestock feed pellet binders.



  • Pond, Lagoon and Landfill Sealant
  • Forest Service Roads
  • Slurry Trench
  • Pumpable Grout
  • Water Well Casing Seal
  • Well Abandonment
  • Pellet Binder
  • Horizontal Drilling
  • Animal Feeds
  • Flocculant

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