Concrete Cloth

Concrete Canvas is a flexible fabric impregnated with a special pre-mixed cement that hardens when it’s hydrated.

Not only does it make creating irregularly shaped items out of concrete a lot easier, like say shelters, ditches, retaining walls, pond linings and chairs, but unlike a regular concrete mix you can’t use too much water, so it’s idiot-proof as well. In fact, the material will even set underwater in addition to being fireproof and chemical resistant.