"ASTM F88/F88M-23 Standard Test Method for Sealing Strength of Flexible Barrier Materials" is designed to quantify sealing strength for verification processes, control processes, and capability assessment. Sealing strength is not only relevant to the opening force and integrity of the Encasement, but also reflects the ability to achieve consistent sealing during the Encasement process. The standard states that it is also useful to report the average force of opening sealing in certain applications. Part of the force that may be measured in the test is due to bending rather than sealing strength alone, so it is recommended that fixtures and techniques (such as Techniques A, B, or C) be used in the test to control this effect. This method is suitable for flexible barrier materials and seals from a variety of sources. It can determine the required separation force of seals and identify the failure mode of samples. This standard is suitable for laboratory and commercial environments and provides test results in SI units or inch-pound units. The user needs to choose the appropriate unit according to the application requirements.