Caulking Iron Sea Terms A chisel-shaped instrument used for driving oakum into the seams of a vessel. Sundries — fender, belaying-pin, bolts, serving-mallet, scraper, chain-hook, marling-spike, hand-spike, ballast-shovel, bucket, boatswain's chair, can-hooks, caulking-iron, ladders, thimble, hank, truck and caulking-mallet ← CaulkingAll “C” entriesCaulking Mallet →