What is shrink film used for? Shrink wrap, also referred to as shrink film or shrink wrap, is a versatile polymer material used for the packaging of finished goods. Heat is applied to the film – by either a conveyor heat tunnel or an electric or gas heat gun – which catalyzes the film to shrink tightly around the item placed within What is heat shrinkable film? INTRODUCTION. Shrink film is used to bundle, collate, or over-wrap products for unitization, display esthetics, and/or tamper resistance. Films made from these LDPEs have very good shrink performance, give tight packages when unitizing goods