Have been adding thin layers of ordinary carpenters white glue in a mould this week. Since I am using a rather deep "mould" this time, I had to make the layers thin to get them dried out properly before I added the next layer. These will cover the foundation of the ore bins.
225018 -- as far as it looks now
225237 -- while peeling of from the mould
225406 -- closeup
225406 -- almost shine through... see the foam behind
230247 -- cut in strips and glued to the sides
230257 -- one mould is just enough for four walls
230306 -- waiting for it to dry so I can add to other side to