Round Tack Accent Table Slate Gray ConcreteContemporary style End Table with Slate Gray Sealed Concrete, which can be used both Indoors and Outdoors. District Collection Concrete is a fiber-reinforced material comprised of granite stone powder, cement, natural jute fibers and water. Although not considered a defect, non-structural hairline cracks are possible as a result of shrinkage and the natural curing process. By ordering products from this collection, you accept the natural characteristics unique to each item and agree that no claims will be approved regarding these natural variations. Concrete should be coated with Paraffin wax on a regular basis to ensure finish is protected over time.