The durability of a polypropylene strap seal depends on several factors, including the quality of the seal itself, the application, and the conditions of use. However, generally, polypropylene strap seals are designed to be strong and long-lasting. Polypropylene is a thermoplastic polymer known for its excellent tensile strength and resistance to wear and tear. It is resistant to chemicals, moisture, and weathering, which adds to its durability.
Polypropylene strap seals can withstand significant tension and provide reliable security when applied and secured properly.

Polypropylene strap seals typically have a tensile strength ranging from around 300 pounds (136 kilograms) to over 1,000 pounds (454 kilograms). These figures are approximate and can vary based on the width and thickness of the strap. It's important to note that the maximum tension or strength of the polypropylene strap also depends on other factors, such as the quality of the material, the manufacturing process, and the specific application. Additionally, the method of securing the strap, such as the type of buckle or seal used, can affect its overall strength. When using polypropylene straps, it is important to consider the weight and nature of the load and any external factors such as temperature, handling, and environmental conditions. Adhering to the manufacturer's recommendations and guidelines will help ensure the strap's optimal performance and safety.

Polypropylene strap seals can be used for both lightweight and heavy-duty packaging, depending on the specific application requirements. They are versatile and offer various benefits, such as high tensile strength, resistance to moisture and chemicals, and affordability. The configuration and strength requirements will vary depending on the nature of the packaging application. It's advisable to consult with packaging experts or suppliers to determine the most appropriate strap and seal combination for your specific needs.