Basalt rebar, which is basically like epoxy fiberglass as used in boats, wind generator blades, etc. except basalt fibers and just really long. However, it can'

Basalt rebar, which is basically like epoxy fiberglass as used in boats, wind generator blades, etc. except basalt fibers and just really long. However, it can't be bent so you have to make joins at every corner and have to order all bent pieces ahead of time.