The Xyron Refill Cartridge AT201-50 Roll Set for the Xyron 850 features a Permanent Adhesive and is 50' long. It applies an even, edge-to-edge layer of permanent adhesive to almost any item. Great for fabric applique and many other uses. The standard adhesive has an adhesive level of about an "8" on a 1 to 10 scale. The high tack would be a "10".