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The thermal enhancement compound used with our Thermal Grout products should be high-grade silica sand. The sand should be a washed, dried, pre-packaged silica sand compound which is graded with a round grain shape and should have an AFS Grain Fineness Number (GFN) between 50.0 and 80.0. The Silica Dioxide (SiO2) content of the sand should be greater than 99%.
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