Mipa P 53 is a very easily sandable 2-component fiberglass lightweight filler based on polyester resin, with adhesion to iron and steel, zinc, aluminum, fiberglass-reinforced plastic (GRP), and wooden substrates, and has a very low specific weight of about 1.05 - 1.1 g/ml. Due to its fiber glass content, the product is particularly suitable for bridging cracks, small holes, and rust-throughs in car repair, as well as in vehicle and machine construction. Since Mipa P 53 has a very low density, the material is also ideal for use in model making and areas where weight reduction is required. In addition, its high water resistance ensures trouble-free use in the boating sector.