Zimmerit is a special mass used on German armored vehicles from the Second World War to prevent the attachment of anti-tank hand grants to them. with a shaped charge, and attached to the armor with magnets. Zimmerit was used on German cars from 1942, actually until the end of the war, but in 1944 its use was significantly reduced due to information about its alleged flammability. The mass in question consists of several components, including: polyvinyl acetate, wood shavings, barium sulphate and zinc sulphate. Before application, the mass had a consistency similar to mixed gypsum mortar, and at the factory it was applied to the armor of cars in two layers, which of course extended the process of their construction. Zimmerit was applied to many German armored vehicles, including: Panzer III, IV, V and VI tanks, and the StuG III and IV self-propelled guns.