Coextruded polymeric films comprising at least one base layer and an outer cold seal layer formed from a blend of a synthetic rubber and a tackifier, at least one of the outer surfaces of the film including an antiblock agent. The work tank is equipped with a heater to keep the temperature of the fluid and the preservative in the work tank at a predetermined level. The support bracket also has a second end for lockingly engaging and supporting a front support rod of the shelf. The speed of the vehicle is limited to the maximum permissible speed.