The very first UNICAT bodies were completely manufactured from sandwich panels featuring surface layers of fibreglass-reinforced polyester (GF-UP). In those days even the floor plate got a GF-UP top layer, inside and out. The panels were connected by externally and internally bonded angle sections made of the same material so that corrosion problems and thermal stresses were ruled out by the design. Even the oldest bodies are still in operation today, and many of them have seen the entire world. Today, floor panels are reinforced with a tubular steel frame which permits a strong and durable connection with the floor assembly. Doors and windows have reinforced corners, special hinges with theft-proof fittings, double seals, insulating toughened glass and multiple stainless steel locking mechanisms.