Techo-Bloc 007818 6" x 13" x 80mm Blu Slate Paver Champlain Grey - This paver may be used to pave driveways, pool decks, walkways, patios, and other surfaces. It can also be used alone for a large-scale herringbone pattern. It is de-icing salt resistant and can withstand harsh climates. Pavers are a very popular building material. They are a great option because there are endless patterns, shapes, and colors that can be used to fit any need.