MIL-S-45180 §4.6.2 Solubility Test Panels
Recessed aluminum test panels used in testing by MIL-S-45180 §4.6.2 (Solubility Test). These aluminum panels are 1" x 4" x 1/4", with a recessed area on one face as shown in MIL-S-45180 Figure 1. Each panel has a 1/4" hole at one end. This test requires three test panels for each type of sealing compound being tested.