Building equipment in polyethylene bags. Photo caption: Film produced from Bakelite polyethylene makes an ideal protective covering for building equipment and materials that have to be stored out of doors for any length of time. The film is completely resistant to water, moisture vapour, and is light in weight, strong and resistant to tearing. This photograph shows polyethylene film being used in protecting bags of cement during showery weather. This item is part of the MoDiP BXL collection.