I am new to this stuff, but am wanting to make a rs with a steel drum on top like a mass heater. This will be in my garden to radiate heat.
I have decided I want to cast the burn chamber and chimney out of vermiculite, but am not sure what to mix it with to stay together. It will be out of direct rainfall, but the bottom will get damp. What adhesive is recommended? Would plaster of Paris work? Thanks