From Roman galleys at Ostia sealed with pine pitch and wax, to Viking longships excavated at Roskilde packed with tarred oakum, Caulk follows the humble filler that kept worlds afloat. Historian Kenji Larsson combs shipyard ledgers from Lübeck, Charleston, and Sur to trace fibers, mallets, and irons across empires and oceans. Along the way appear ropewalks, coopers' yards, and the pungent kettles that bound hull to horizon.
As steam and steel arrived in Chatham Dockyard and on the Tyne, caulking evolved—from hemp and bitumen to red lead putty and the ringing of caulking chisels along iron seams. Larsson interweaves the notebooks of Eleanor Brackett, a 1901 dockyard forewoman, with oral histories from Omani dhow builders and Japanese shipwrights of the Seto Inland Sea. In chapters that move from flooded rice barns in Ishikawa to wildfire-scorched log cabins in Minnesota, the book reveals how sealing a crack became a craft, an industry, and a language of resilience.