Aluminum foil facing is a thin layer of aluminum used for insulation, moisture protection, and as a barrier to light and air. It is commonly used in construction and food packaging for its heat and cold resistance. Plastic wrap, on the other hand, is made from plastic polymers like polyethylene and is primarily used for food storage, keeping food fresh by sealing in moisture and preventing contamination. Unlike aluminum foil, plastic wrap is transparent, clingy, and does not conduct heat, making it unsuitable for cooking or insulation purposes.