ASTM F392/F392M-23 standard practice is designed to regulate flexible barrier materials to assess their resistance to bend-formed pinholing. This practice is regulated with grades A, B, or C, referring to practice E171 and guideline F2097. The standard focuses on the material's performance after bending, particularly the effect of flexure on barrier performance and gas or moisture transfer rates. Although no measurement of abrasion associated with bending failure may be required, Miscellaneous test methods may be required to assess the integrity of multi-layer structures. The standard provides appropriate test conditions to prevent too many or too few holes in the results, thus ensuring the validity of the evaluation.