The thesis work that I am going to introduce in this abstract, it regards one of the most common failures in automotive industry, called Paint runner. Robert Bosch company is working since 1973 to produce wiper arms and blades for OE (Original Equipment) and AM (After Market). RBBE also deals with processes as compounding, coating, injection molding and extrusion of rubbers. Leader of this market and also promoter of new technologies and solutions. A wiper arm is defined as the contact consisting of a conducting arm that rotates over a series of fixed contacts and comes to rest on an outlet.