MIL-B-121F (NOTICE 2), MILITARY SPECIFICATION: BARRIER MATERIAL, GREASEPROOFED, WATERPROOFED, FLEXIBLE (15 DEC 1999) [S/S BY MIL-PRF-121F]

MIL-B-121F (NOTICE 2), MILITARY SPECIFICATION: BARRIER MATERIAL, GREASEPROOFED, WATERPROOFED, FLEXIBLE (15 DEC 1999) [S/S BY MIL-PRF-121F]., MIL-B-121F, dated 16 June 1989, is hereby reactivated and may be used for either new or existing design acquisitions.