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Green Patch 200 grams
Green Patch: the refractory cement patch material used to repair and maintain the refractory hot-face/ firebox.
Lip cracks from repetitive freeze-thaw cycles are best fixed with
J-B Weld 8297 HighHeat 500 Degree Epoxy Putty - 2 oz
https://www.amazon.com/J-B-Weld-8297-HighHeat-Degree/dp/B007PP26RI?th=1