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FAQ/Answer

Approximately how much liquid cement should we mix with grog (powdered firebrick) to make a patch? The information on your website says to add just enough cement to hold the grog together.

The grog/kiln cement mixture should have the consistency of cake dough. Use as much grog as possible while still having a sticky consistency. The grog prevents the filling from breaking out later. (Solid cement would not stay in place because of the difference in coefficient of expansion between the kiln cement and the firebricks.)



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