caulking

Etymology

verb

1. present participle and gerund of caulk

noun

1. A sealing material used to seal joints between heterogeneous materials in many kinds of construction and manufacture.
   Oakum was used for the caulking of the hulls of wooden ships.
   Marina's bedroom was a small charming room with small charming windows of aged glass, dating to the mid-1800s, windowpanes badly in need of caulking, overlooking St. Agnes Roman Catholic Church with its heraldic spire floating on the night sky, and its ancient bumpy churchyard. 2001, Middle Age: A Romance, Joyce Carol Oates (Fourth Estate, paperback edition, 17)
   It might just be the caulking. This whole tub needs to be re-caulked. Did you take a bath or shower in the last couple of hours? 2016, Kenneth Lonergan, Manchester by the Sea, spoken by Lee Chandler (Casey Affleck)