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Easy-to-use bentonite grouting slurry


SMOOTH GROUT 20 slurry is an easy‐to‐use bentonite‐grouting composition containing high‐swelling sodium montmorillonite clay. It is designed for use in water wells and monitoring wells, for sealing the annular space around a well casing, and for plugging drilled holes and abandoned wells.

SMOOTH GROUT 20 slurry contains no organic additives or polymers. SMOOTH GROUT 20 is a one‐sack formulation that mixes with freshwater to yield a 20% pumpable grouting slurry with an extended working time. When set up, the SMOOTH GROUT 20 slurry develops a satisfactory seal with adequate structural strength and low‐hydraulic conductivity. When properly placed, SMOOTH GROUT 20 slurry remains flexible, rehydratable and unstratified through heating and cooling cycles.


  • Sanitary sealing in water‐well construction
  • Sealing in monitoring wells
  • Sealing and grouting casings
  • Plugging abandoned exploration boreholes


  • Inorganic, non‐fermenting, and non‐toxic
  • Develops lower‐solids slurries up to 20% total active solids
  • Easy one‐sack mixing
  • Mixed and handled with most conventional rig equipment
  • Permanent, flexible seal prevents entry of contaminants from the surface
  • Extended working time controlled by grout‐solids content
  • Firm texture providing structural stability after grout is set

    Product Sheets

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