This standard provides a method for the measurement of the mechanical sealing strength of a circular container with a flexible peelable lid. Unlike the conventional F88 test, this method separates the entire lid from the container and records force data for the entire sealing area to evaluate the conformity and uniformity of the sealing. The test determines the strength of the sealing by applying a continuous and maximum force and is suitable for a variety of container shapes, including round, oval and rectangular. This method is used for mass assurance and sealing performance evaluation and can be applied to a variety of product Encasements, such as food, chemicals and pharmaceuticals.