Abstract: A decorative splash rail for boats utilizes a sheet material formed into a longitudinal three dimensional shape having the marginal edges thereof directed towards each other residing in a plane forming a mounting surface. The cavity formed by the sheet and the mounting surface is filled with a rubber-like closed cell foam material providing buoyancy for the apparatus in the event of accidental dislodgement from the side walls of the boat carrying it. A layer of a double faced adhesive is utilized to secure the apparatus to the boat. Drain holes are provided facilitating the removal of excess amounts of water from within the cavity formed by the apparatus and the side wall of the boat. The external surface of the apparatus may bear various colors creating a bright and pleasing design.