Shrink wrap, also shrink film, is a material made up of polymer plastic film. When heat is applied, it shrinks tightly over whatever it is covering. Heat can be applied with a handheld heat gun (electric or gas), or the product and film can pass through a heat tunnel on a conveyor.
Shrink wrap for heat sealing soap and bath bombs and other products. This is a double layer that opens up.it is 40cm folded over to make a 20cm sleeve