This product is sold and priced by the Square Foot.
Cuts are easily made with a tile saw /cutter with a metal cutting wheel and grinder.
Installation can be made with a liberal, thin coating of silicon adhesive. For exterior installation, use a silicon adhesive plus 3M recommends using “VHB” (very high bonding) tape
Tiles are not pre-sealed. Aluminum can tarnish or slightly discolor if not sealed or waxed. There are a variety of metal sealers available and commercial metal wax is also a good sealer. Select the appropriate sealing method for the location of installation. Sealing is not required.
Grouting is optional. Tape the tiles before grouting to speed clean up.