The most commonly used shrink wrap is polyolefin. It is available in a variety of thicknesses, clarities, strengths and shrink ratios. The two primary films can be either cross linked, or non cross linked. Other shrink films include PVC, Polyethylene, Polypropylene, and several other compositions.
Please call (800) 331-3526 if you do not see the product you are looking for. We are more than happy to discuss your needs.