a method is disclosed for attaching a fastening tape to a molded article and also a mold is disclosed for forming a cellular plastic or foam product for use as a cushioning material for an automobile seat or backrest . the fastening tape is typically in the form of a velcro - like or surface - type fastener carrying on one side thereof a multiplicity of hooks and on the other side a plurality of anchoring members to anchor a molding materials m in the mold . a flexible sealing flange is formed on the tape for protecting the hooks against leakage therein of the molding material during the molding operation in which cooperating halves of the mold are closed with pressure - applying means engaged with and urging the tape against a flexible bottom wall of the cavity mold .