MIL-S-19653B(SH), MILITARY SPECIFICATION, SEALING COMPOUND (WOOD BEDDING), FORTIFIED (27 JUL 1984)., This specification covers a permanently plastic, waterproofing sealing compound for use between inner and outer planking of double planked hulls, and on other faying surfaces of wooden craft to prevent the passage or accumulation of water and to resist deterioration by decay fungi.