The film backing is waterproof and oil resistant, polyester film isn't easy to be damaged and the surface is more smooth. For the concave and convex surface, the abrasive film will have a good job. It can supply the fine work surface and be folded to any shape, no broken. Using the special resin and advanced electrostatic sand planting process assures the grain is strewed evenly and bonded on the sandpaper films strongly, which supply the excellent working surface and good sand performance. The special no-fil coating effectively prevents dust bonding during the sanding process and extends the service life.