For the ultimate in surface finishes, try our new film backed abrasive discs. The 3 mil film backing is an extremely smooth surface on which to apply abrasive grains. This offers unparalleled consistent finishes when final sanding your workpiece. Since the backing is made of polyethylene film, it is also waterproof, so it can be used to sand all types of finishes. Because of it's extremely flat surface, we offer the film discs only in very fine grits to utilize its smoothing properties. In addition, the film backing will not tear so backing wear is basically non-existent. These discs are produced using our top of the line Xtra-Lube stearate combined with aluminum oxide grains for extended life and no loading.