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Two-Part Thermally Conductive Grout

BAROTHERM GOLD thermally conductive grout is a bentonite material designed for use in grouting boreholes containing ground source heat loops, and related applications.

BAROTHERM GOLD thermally conductive grout when combined with silica sand or MAX-YIELD™ TCM at various concentrations yields a grout with thermal conductivity values ranging between 0.4 and 1.2 BTU/hr·ft·ºF (0.69 – 2.08 watts/m·°C).

Applications and Functions

  • A thermally conductive grout medium with low permeability for sealing ground source heat loops 
  • May be used with or without thermally conductive products
  • May be enhanced with silica sand or MAX-YIELD TCM


  • NSF/ANSI/CAN Standard 60 certified 
  • Promotes efficient heat transfer 
  • Produces a uniform slurry for smooth pumping – No need to add extra water 
  • Creates a low permeability seal 
  • Develops a permanent, flexible seal to prevent commingling between aquifers 
  • No heat of hydration 
  • No Portland or aluminum cement added
  • No gypsum added

Safety Data Sheets (SDS)