It is vibrating caulking forming by good quality binder.Good thermal conductivity,high compressive resistance,high anti-heat shocking ,unattackable,abrasion resistance,long service life.
The coffin laid upon two line-tubs, between the vice-bench and the open hatchway; the Carpenter caulking its seams; the string of twisted oakum slowly unwinding from a large roll of it placed in the bosom of his frock.