Swapping sand for grog in home brew??? May 4, 2022 7:20:32 GMT via mobile Quote Select PostDeselect PostLink to PostBack to Top Post by dannyboy1975 on May 4, 2022 7:20:32 GMT I guess I’m wandering if I can swap out the sand and clay for grog ( looks like powdered fire bricks) in the home brew recipe?? It’s to cast my dome in a trailer. Thanks for any help?