Polyester fiberglass putty designed for use in body shops, railway equipment, machinery, boats to fill dents, cracks, perforations or splinters in steel, cast iron or fiberglass polyester laminates. It can also be used in the construction of models and prototypes where an easily malleable material with easy grinding is required. It stands out for its ease of application, filling power, resistance and sandability. Increases the mechanical resistance of the repaired element.