A seam comprising a first piece of laminated fabric, a second piece of laminated fabric, a layer of adhesive hydrostatic polymer, and a seam tape wherein the first and second pieces of laminated fabrics are coupled together at a common border with the layer of adhesive hydrostatic polymer to form a seam, and wherein the seam tape is at least partially coupled along the seam. A method of forming a seam comprising stacking, in order, a first piece of laminated fabric, at least one strip of adhesive hydrostatic polymer, and a second piece of laminated fabric, ultrasonically coupling the first piece of laminated fabric, strips of adhesive hydrostatic polymer, and second piece of laminated fabric together, wherein at least a portion of adhesive hydrostatic polymer from the strips of adhesive hydrostatic polymer is extruded through the seam, and applying a seam tape along at least a portion of the seam.