A characteristic feature of this putty is its versatility, i.e. the capacity of application on virtually all substrates encountered in body coating; good performance in filling small and large cavities, easy application at elevated temperature and high surface smoothness, good sandability with fine and coarse sand papers, and the hardness selected to retain the desired profile during sanding. The high reactivity of the putty ensures a short time needed to obtain proper hardness for sanding at low temperatures and reduces the time of work.