A cold applied adhesive that includes a blend of polyurethane pre-polymer, petroleum liquid and additive. The apparatus comprises essentially an electrode within a chamber having an inlet and an outlet. Until a temperature of the wafer W reaches a predetermined treatment temperature, an average concentration of the solvent component in a mixed gas is gradually raised relative to the temperature of the wafer W. One method of forming the door trim speaker grille is by an injection molding process that places the electroluminescent lamp as an insert in the mold cavity.