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DSI Underground  ›  Drilling Fluids  ›  POLY-BORE™


Drilling Fluids


POLY-BORE is a free flowing, water-soluble, easy mixing, 100% dry granular polymer. POLY-BORE is a very high molecular weight partially hydrolyzed polyacrylamide (PHPA) polymer. When mixed with fresh water, a small quantity of POLY-BORE provides a clear, solid-free, viscous borehole stabilizing fluid for use in drilled shaft, auger drilling, horizontal directional boring, trenching excavation and reverse circulation (RC) rotary drilling. POLY-BORE is not designed to be used in conjunction with bentonite based fluids.



  • Provide a clay-free boring fluid
  • Stabilize reactive clay and shale formations
  • Enhance core recovery in continuous wireline coring operations
  • Provide high cohesiveness to bind excavated sandy soil and gravel
  • Facilitate the removal of drilled spoils from augers and increase excavation rate
  • Maximize load transfer for drilled shaft application


  • Disperses easily with minimal shear
  • Efficient shale/clay stabilizer and viscosifier
  • Does not require solids control unit to clean the slurry
  • Promotes stable and gage borehole
  • Results in maximum skin friction and ultimate end bearing capacity for a drilled shaft
  • Non-fermenting
  • No petroleum distillates involved
  • Breaks down chemically with bleach (sodium hypochlorite)
  • NSF/ANSI Standard 60 certified

Recommended Treatment


  • Add 0.5 to 1 pound of POLY-BORE dry polymer per 100 gallons of fresh water (0.6 - 1.2 kg/m3 ) slowly through the hopper. (See Mix Instructions below)

Mix Instructions

  • 15 to 20 minutes to allow POLY-BORE to hydrate
  • Measure the funnel viscosity of the polymer slurry and adjust according to required specifications


  • Water pH between 8.5 – 9.5
  • Reduce total hardness of make-up water by adding soda ash (sodium carbonate) at 0.5 to 1 pound per 100 gallons (0.6 - 1.2 kg/m3) of make-up water.
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