Bondo Fiberglass Cloth provides added strength for repairs requiring extra reinforcement. Use Bondo Fiberglass Cloth with Bondo Fiberglass Resin for repairs on almost any surface, including metal, fiberglass and wood. This woven fiberglass cloth is thinner and more flexible than Bondo Fiberglass Mat to provide a smoother finish. It is perfect for repairs made on use on automobiles, boats, tubs, showers, sinks, pools, hot tubs and more.