Not the same. If it is powerful, the functions of sound insulation cotton and heat insulation cotton are combined into one. It is a patented product called Super Windsor. It is not only sound-absorbing and heat-insulating, but also flame-retardant. It is mainly used for car doors, trunks and roofs. The thermal insulation film is also a patented product and becomes the hood insulation film, which is used on the hood. Materials, shapes, functions, and applicable environments all have standards and are different things.