Northern Industrial 1/2in. poly strapping is suitable for a variety of shipping applications.Polypropylene strapping is the most commonly used and least expensive of all strapping materials. It's light and easy to apply and recycle. Signode Poly Strapping characteristics include high elongation and recovery, but low retained tension. Polypropylene strapping is available in both manual and machine grade and can be sealed with buckles, seals, heat seals, or friction welds. Polypropylene strapping is an excellent choice for light duty palletizing, unitizing, carton closing, and bundling. It is used in all semi-automatic strappers and nearly all stand alone arch machines.