Concrete Cloth PVC-backed, cement-impregnated material allows concrete construction without the need for plant or mixing equipment. Contractors unroll the 3-ft. cloth and form it to shape, grade, and position, and add water. The material can and be cut using basic hand tools. Contractors can form drainage channels, wrap pipe for protection, create an erosion-control barrier, or secure on grade for a concrete path. Once hydrated, material remains workable for two hours and hardens to 80% strength within 24 hours. Concrete Canvas Ltd. 001-44-1443-841984.