A trim covering for a seat assembly of a vehicle, the trim cover having an inner and outer surface and a bonding tape applied to at least one of the inner or outer surfaces. The bonding tape is used to bond portions of the trim cover together, provide additional structural integrated to the trim cover and provide improved craftsmanship in closing-out certain areas of the trim cover. A method of performing a trim cover assembly for use in a seat assembly of a vehicle. The method includes applying heat and pressure over a predetermined time period to bonding tape arranged at a joint between at least two trim components, placing such bonding tape and trim components in a mold, and applying heat and pressure over a predetermined time period to such trim components having the bonding tape arranged at a joint, to form a one-piece trim assembly.