Shrink film is used to secure a load to the pallet. The film is placed on the load covering it, and is heated with hot air or with a torch. The film material is specially designed to shrink under heat, consolidating the pallet. This method is also effective with irregularly shaped loads, although usage is decreasing due to the rather high cost.
The film characteristics make it suitable for guaranteeing good protection from dust and dirt, while given the high degree of permeability, the protection from humidity is not high. Therefore this solution alone does not offer adequate protection of corrosion sensitive components stored outdoors.
The video shows some examples of manual application, while there are also semi-automatic or automatic systems.