Thermo 99+ Sand

Thermo 99+ is a high-grade silica sand. When used with Connect Plus thermal grouts they provide maximum thermal conductivity. Thermo 99+ is a washed and dried pre-packaged compound with an AFS Grain Fitness Number (GFN) between 50.0 and 80.0 with a silica content greater than 99%.



  • Thermal enhancements of geothermal grouts
  • Thermal enhancements of Thermo-Loops®


  • 99% silica
  • Thermal enhancers
  • Washed, dried and pre-packaged
  • Average grain size 231 microns
  • AFS-GFN 62