Poly cord strapping is made of polyester and has embedded cords that provide more strength and higher resistance to shock and tearing than standard polyester strapping, and is used to secure lumber, bricks and stone, metal, and other heavy loads. It's similar in strength to steel strapping but is safer to use and is more flexible for using around edges and irregular shapes. It also does not scratch or mar surfaces and is more resistant to shock. It won't rust and withstands temperature changes, rain, snow, and exposure to other elements when used outdoors. The ends are secured using a handle tie or sealed with a strapping buckle, seal, friction weld, or heat. Apply and seal strapping using a strapping machine or manually-operated tools.