Omni PVC Heat Shrink Film is the most common and economical type of Shrink Film available. When heat is applied to the Shrink Film it shrinks tightly over whatever it is covering. Heat can be applied with a hand held heat gun or the product and film can pass on a conveyor through heat or shrink tunnel. However, this shrink wrap was never been allowed to be used within the Food Industry as it releases small quantities of hydrogen chloride into the air and carbon deposits onto the sealer. Proper ventilation is required when sealing PVC Shrink Film. View Blog – What is the difference between PVC and Polyolefin Heat Shrink Film?