46 CFR 160.054-5 - Inspections and tests.
(a) Salt spray. The container shall be exposed to a spray of 20 percent by weight of reagent grade sodium chloride at about 95 °F. for 100 hours. There shall be no disintegration of the material as a result of this test.
(b) Container Watertightness. With the required number of items inside, the closed container, with reclosable edge uppermost, shall be submerged under a head of one foot of water for a period of two hours. At the end of this period, the container shall be removed, surface dried, opened, and examined for the presence of moisture. No seepage shall be allowed.