caulk
noun
°caulking.
°a composition of vehicle and pigment used at ambient temperatures for filling/sealing joints or junctures, that remains elastic for an extended period of time after application.
verb
°(nautical) To drive oakum into the seams of a ship's wooden deck or hull in order to make them watertight.
°To apply caulking to joints, cracks, or a juncture of different materials.