Oakum
Oakum is a preparation of tarred fibre used to seal gaps. Its main traditional applications were in shipbuilding, for caulking or packing the joints of timbers in wooden vessels and the deck planking of iron and steel ships; in plumbing, for sealing joints in cast iron pipe; and in log cabins for chinking. In ship caulking, it was forced between the seams using a hammer and a caulking iron, then sealed into place with hot pitch.
Tar (string instrument)
The tar appeared in its present form in the middle of the eighteenth century in Persia. The body is a double-bowl shape carved from mulberry wood, with a thin membrane of stretched lamb-skin covering the top.