Kaolin is used as a reinforcing agent for many polymer products; the resulting composite material is properly known as fiber-reinforced polymer (FRP) or glass-reinforced plastic (GRP). Kaolin is one of the ingredients for manufacturing fiberglass. Kaolin is used in fiberglass as a filler and also enables strengthening of the fibers integrated into the material, It also improves the integration of fibers in products requiring strengthened plastics: cars, boats and marine products, sporting goods and recreation products, aviation and aerospace products, circuit board manufacturing, fiberglass insulation, fiberglass air filters, fiberglass tanks and pipes, corrosion-resistant fiberglass products, fiberglass building, and construction products. The concentration of kaolin in the binder is determined by the chemical nature of the fiber, it’s surface composition and properties, and the textile structure of the reinforcing system.