A marine grade, exterior composite finish flooring comprised of a plurality of synthetic wood strips, evenly spaced and joined with a silicone adhesive. The fabrication process involves coating a board with a masking agent and then sawing the board into strips so that the masking agent is only on the tops of the strips and not on the edges. Then adhering the strips to a substrate to achieve proper spacing and orientation. A silicone adhesive caulk is then pressed into the joints and allowed to partially cure. The caulk stuck on the surface of the boards is easily removed as a result of the masking agent. Completed panels are then adhered to a subfloor, for example on the deck of a boat for a durable and aesthetically pleasing deck surface.