POR 15 49533 Power Mesh Reinforcing Fiberglass Fabric - 1 Square Yard Special fiberglass reinforcing fabric. Can be used with POR-15 Rust Preventive paint to bridge gaps and repair holes in sheet metal. Handling Instructions: Do not handle fabric with bare hands. Wear a pair of gloves (or other protection) whenever you handle this cloth. Please note that there is one large piece of cloth in this envelope. As you cut the cloth, some fibers may fly into the air, so be sure to wear the mask provided while cutting. Fibers may pierce your skin and you will experience discomfort.