Concrete Canvas is a flexible cement impregnated fabric that hardens on hydration to form a thin, durable water proof and fire proof concrete layer. Essentially, it's concrete on a roll, all you have to do is just add water. Concrete Canvas is available in man portable rolls for applications with limited access or where heavy plant equipment is not available. There is no need for mixing or measuring, the concrete is premixed and cannot be over hydrated. It will set underwater and in sea water.