3M Uncoated Cloth Belt is an uncoated, nonabrasive belt construction. Belts are available in a variety of widths, lengths and backing weights. These belts are typically used for polishing with an applied compound or cleaning applications in which non-abrasive techniques are required.3M Uncoated Cloth Belt is an uncoated, nonabrasive belt construction. Belts are available in a variety of widths, lengths and backing weights. These belts are typically used for polishing with an applied compound or cleaning applications in which non-abrasive techniques are required. Belt materials available include J, X and YF-weight cloth and F-weight paper.