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The combination of fresh water, Therm-Ex Grout and silica sand constitute the system for back filling geothermal loops. Use locally available dry silica sand. For best results, use sand ranging in size from 30 mesh to 70 mesh (AFS GFN particle size classification 38 to 50). 

Mix as follows:

Add the Therm-Ex Grout to the water while agitating. Mix for approximately one minute, then add the sand. Agitate until the sand is uniformly dispersed and pump into place using a tremie line.

For best results, place the tremie line near the bottom of the loop and pump into place. Providing local regulations allow, slowly extracting the tremie line as you come up the hole reduces pump pressure, aids the grout in setting quicker, and reduces the opportunity for formation
damage.

WHMIS: Controlled (see MSDS) 

TDG: Not regulated 

Packaging: 50lb sack / bulk